• Nov 2023:

    -- Qiangfei is recognized as a "Highly Cited Researcher" in 2023 by the Clarivate. According to Clarivate, of the world’s population of scientists and social scientists, Highly Cited Researchers™ are 1 in 1,000. See the full list here.
  • Sept 2023:

    -- Alireza Jaberi Rad and Yuhan Gao joined the group as Ph.D. students. Welcome on board!
  • Jun 2023:

    -- Joshua Tuckie and Serene Feng joined the group as REU students. Welcome on board!
  • May 2023:

    -- Qiangfei is recognized as the "Outstanding Senior Faculty" in the College of Engineering. Read the story here.
  • Mar 2023:

    -- Our paper "Thousands of conductance levels in memristors integrated on CMOS" is published in Nature. Congrats to all! Link to the paper: Rao et al., Nature 615, 823–829 (2023). Read the Research Briefings that tells the story behind the paper.

  • Nov 2022:

    -- Qiangfei is elevated to IEEE Fellow "for contributions to resistive memory arrays and devices for in-memory computing."
    -- Qiangfei is recognized as a "Highly Cited Researcher" in 2022 by the Clarivate along with 11 other colleagues from UMass. According to Clarivate, of the world’s population of scientists and social scientists, Highly Cited Researchers™ are 1 in 1,000. See the full list here.
  • Sept 2022:

    -- Koushik Kumar joined the group as a Ph.D. student. Welcome on board, Koushik!
  • Aug 2022:

    -- Our preliminary study "Diffusive Memristors with Uniform and Tunable Relaxation Time for Spike Generation in Event-Based Pattern Recognition" is published in Advanced Materials. Congrats to Fan and all! Link to the paper: Ye et al., Advanced Materials 34, 2204778 (2022).

    -- We have had a wonderful time working with three brilliant undergraduate students, Cameron Reyno, Chris Xu, and Tergel Molom-Ochir. Congratulations on a fruitful summer!
  • May 2022:

    -- Yi is a co-recipient of the David H. Navon scholarship from ECE department. Congratulations!
  • March 2022:

    -- Dr. Balakumar Muniandi joined the group. Welcome on board, Bala!
  • Oct 2021:

    -- Our paper "A fully hardware-based memristive multilayer neural network" is published in Science Advances. Congrats to Fatemeh and all! Link to the paper: Kiani et al., Science Advances 7, eabj4801 (2021).

    -- We wrote a short News & Views piece for Nature Materials titled "The Secret Order of Disorder". Link to the paper: Xia et al., Nature Materials, published online Oct. 4, 2021. doi: 10.1038/s41563-021-01110-3

  • Aug 2021:

    -- Wuyu Zhao joined the group as a Ph.D. student. Welcome on board, Wuyu!
    -- We have had a wonderful time working with five brilliant REU students, Stephanie He, Rohan Sheridan, Anse Saint Louis, Andrew Heermance, Ethan Zhang. Congratulations on a fruitful summer!
  • June 2021:

    -- Ali Abdel-Maksoud named rising researchers at UMass, class of 2021. Congratulations!
    -- Ali Abdel-Maksoud joined the group as a Ph.D. student. Welcome on board, Ali!
  • May 2021:

    -- Fatemeh was awarded the David H. Navon scholarship from ECE department. Congratulations!
  • September 2020:

    -- Remy Roo joined the group. Welcome on board!
  • August 2020:

    -- Dr. Fan Ye joined the group. Welcome on board!
    -- Former group member, Daniel Belkin started (remotely first) as a PhD student in Condensed Matter Physics at The University of Illinois at Urbana-Champaign. Congratulations!
  • July 2020:

    -- Dr. Zhongrui Wang joined the University of Hong Kong as an assistant professor. Congratulations!
    -- Former group member, Dr. Can Li joined the University of Hong Kong as an assistant professor. Congratulations!
    -- Bryce Flannery joined General Dynamics. Congratulations!
    -- Former group members, Harrison Liu and Anamitra Datta joined Raytheon Technologies. Congratulations!
    -- Former group member, Meg Hardin joined Analog Devices. Congratulations!
  • May 2020:

    -- Vignesh was awarded the David H. Navon scholarship from ECE department. Congratulations!
  • April 2020:

    -- Our paper "Three-dimensional memristor circuits as complex neural networks" is published in Nature Electronics as the cover article. Congrats to Peng and all! Link to the paper: Lin et al., Nature Electronics 3, 225-232(2020).

    UMass College of Engineering news: is here.

    This work is also highlighted at TechXplore and reported in The Frankfurter Allgemeine Zeitung, etc.
  • January 2020:

    -- Our Review article "Resistive switching materials for information processing" is published in Nature Reviews Materials . Link to the paper: Wang et al., Nature Reviews Materials 5, 173-195(2020).

  • September 2019:

    -- Our paper "In situ training of feed-forward and recurrent convolutional memristor networks" is published in Nature Machine Intelligence. Congrats to Zhongrui and all! Link to the paper: Wang et al., Nature Machine Intelligence 1, 4340-442(2019).

  • July 2019:

    -- Daniel Belkin joined the group. Welcome back Daniel!
  • May 2019:

    -- Qiangfei was elected to the steering committee of EIPBN (2019-24), and will serve as the conference chair for EIPBN'22.

    -- Qiangfei gave a short course titled "Emerging Hardware for Neuromorphic Computing" at EIPBN'19.

    -- Qiangfei organized the 'In-Memory Computing' tutorial session and gave one of the three lectures titled "In Memory Computing with Emerging Memory Technologies" at the 11th IEEE International Memory Workshop (IMW'19).

  • March 2019:

    -- Our Review article "Memristive crossbar arrays for brain-inspired computing" is published in Nature Materials . Link to the paper: Xia and Yang, Nature Materials 18, 309-323(2019).

    -- Our paper "Reinforcement learning with analogue memristor arrays" is published in Nature Electronics. Congrats to Zhongrui and all! Link to the paper: Wang et al., Nature Electronics 2, 115-124(2019). .

    Also highlighted in the News and Views in Nature Electronics: Memristors learn to play.
  • February 2019:

    -- Rui Wang joined the group. Welcome!
  • January 2019:

    -- Our paper "Long short-term memory networks in memristor crossbar arrays" is published in Nature Machine Intelligence. Congrats to Can and all! Link to the paper: Li et al., Nature Machine Intelligence 1, 49-57 (2019). DOI: s42256-018-0001-4.

    Umass College of Engineering news: is here.

    Also highlighted in the News and Views in Nature Machine Intelligence: A role for analogue memory in AI hardware.
    -- Our 2-nm memristor work is highlighted in an Editorial by Nature Nanotechnology: Testing memory downsizing limits (Nature Nanotechnology 14, 1 (2019)).

  • November 2018:

    -- Our paper "Memristor crossbar arrays with 6-nm half-pitch and 2-nm critical dimension" is published in Nature Nanotechnology. Congrats to Shuang and all! Link to the paper: Pi et al., Nature Nanotechnology. Published online Nov. 12, 2018. DOI: s41565-018-0302-0.

    Umass College of Engineering news: UMass Engineers Made Crossbar Arrays of the Smallest Memristors.

    Also highlighted at UMass News, MIT Technology Review "This week's most thought-provoking papers from the Physics arXiv", Next Big Future, and many more news outlets.
  • October 2018:

    -- Our paper "A provable key destruction scheme based on memristive crossbar arrays" is published in Nature Electronics. Congrats to Hao and all! Link to the paper: Jiang et al., Nature Electronics 1, 548-554 (2018). DOI: s41928-018-0146-5.

    Umass College of Engineering news: UMass Engineers Create More Secure and Efficient Memristive Hardware Systems.

    Nature Electronics publishes a "News & Views" piece titled "Memristive fingerprints prove key destruction" and an Editorial "Trust in tech" to highlight our work and the importance of hardware security.
    -- Divya Chitkara and Zhiqiang Wang join the group. Welcome!
  • August 2018:

    -- Our paper "Capacitive neural network with neuro-transistors" is published in Nature Communications. Congrats to Zhongrui and all! Link to the paper: Wang et al., Nature Communications 9, 3208 (2018). DOI: 10.1038/s41467-018-05677-5.
  • June 2018:

    -- Our paper "Efficient and self-adaptive in-situ learning in multilayer memristor neural networks" is published in Nature Communications. Congrats to Can and all! Link to the paper: Li et al., Nature Communications 9, 2385(2018). DOI: 10.1038/s41467-018-04484-2. Umass College of Engineering news: Memristor Neural Network Ready for Machine Learning.
    -- Qiangfei is promoted to full professor.
  • May 2018:

    -- Can successfully defended his PhD dissertation titled "CMOS compatible memristor networks for brain-inspired computing". Congratulations, Dr. Li! Some photos from the defense and celebration party at the Gohyang Korean Restaurant can be found here.
    -- Meg Hardin, Harrsion Liu, Tina Maurer, and Anamitra Datta joined the group as REU students for the summer. Welcome aboard!
    -- Our group alum Dr. Shuang Pi was awarded the Best Dissertation Prize at the ECE annual banquet. Congratulations to Shuang!
  • February 2018:

    -- Our paper "Fully memristive neural networks for pattern classification with unsupervised learning" was published in Nature Electronics. Congrats to Zhongrui and all! Link to the paper: Wang et al., Nature Electronics 1, 137-145 (2018). DOI: 10.1038/s41928-018-0023-2. A "News & Views" piece titled "Memristors fire away" that hightlights our work can be found here.
  • January 2018:

    -- Our paper "Analogue signal and image processing with large memristor crossbars" was chosen as the cover article of the inaugural issue of Nature Electronics. Congrats to Can and all! See the cover here. A "News & Views" piece titled "Multiplication on the edge" that hightlights our work can be found here.
    -- Four more papers, including Zhongrui's invited review on threshold switching in Advanced Functional Materials , Rui's PUF work in Nanoscale, Jung Ho's artificial nociceptor work in Nature Communication and Can's collaboration work on DPE in Advanced Materials are published. Check our publication list for details.
  • December 2017:

    -- Yang and Xia groups celebrated New Year in Yang's house. A group photo from the party can be found here
    -- Our paper "Analogue signal and image processing with large memristor crossbars" was published in Nature Electronics. Congrats to Can and all! Link to the paper: Li et al., Nature Electronics (2017). Published online Dec. 4, 2017. DOI: 10.1038/s41928-017-0002-z Umass College of Engineering news is here.
  • October 2017:

    -- Our paper "A novel true random number generator based on a stochastic diffusive memristor" was published in Nature Communications. Congrats to Hao and all! Link to the paper: Jiang et al., Nature Communications 8, 882(2017). Umass College of Engineering news is here.
    -- Hao successfully defended his PhD dissertation. Congratulations, Dr. Jiang! Some photos from the defense and celebration party at the Gohyang Korean Restaurant can be found here.
  • September 2017:

    -- Shuang successfully defended his PhD dissertation. Congratulations, Dr. Pi! Some photos from the defense and celebration party at the House of Teriyaki can be found here.
    -- Qiangfei gave a seminar at Yale University.
    -- Ali Banagozar, Puming Fang joined the group as PhD students, Kristina Georgadarellis as an Honor's thesis senior student, Vignesh Ravichandran as a research intern, welcome aboard! Siyan Lin was back to the group as a MS student, welcome back!
  • August 2017:

    -- Peng successfully defended his PhD dissertation. Congratulations, Dr. Lin! Some photos from the defense and celebration party at the House of Teriyaki can be found here.
    -- Can gave an invited talk at XXVI International Materials Research Congress (IMRC'17) in Cancun, Mexico.
  • July 2017:

    -- Qiangfei was invited to sit on a discussion panel of DARPA ERI workshop in San Jose, CA.
  • June 2017:

    -- Qiangfei gave a seminar at TU Dresden, Germany
    -- Qiangfei gave an invited talk at the 21st International Conference on Solid State Ionics (SSI'17) in Padova, Italy.
    -- Our paper "Three-Dimensional Crossbar Arrays of Self-rectifying Si/SiO2/Si Memristors" was published in Nature Communications. Congrats to Can and all! Link to the paper: Li et al., Nature Communications 8, 15666 (2017). Umass College of Engineering news is here.
  • May 2017:

    -- Our group presented 1 invited talk, 2 contributed talks and 1 invited poster at the EIPBN conference in Orlando, FL. Great jobs, folks!
    -- Dr. Yibo Li joined our group as a postdoctoral scholar. Welcome on board!
    -- Ebenezer Adams and Daniel Belkin joined our group as REU students. Welcome on board!
  • March 2017:

    -- Qiangfei gave seminars in IBM Zurich and Technion, Israel.
  • February 2017:

    -- Our invited commentary "Organic electronics: Battery-like artificial synapses" was published in Nature Materials. Link to the paper: Yang and Xia, Nature Materials 16, 396-397(2017).
  • January 2017:
    -- Qiangfei gave a seminar in INL, Braga, Portugal.
  • December 2016:

    -- The Xia and Yang groups celebrated Xmas with a joint party in Johnny's Tavern in Amherst, MA
  • November 2016:

    -- Qiangfei was invited to attend the 4th NAS Arab-American Frontiers of Science, Engineering and Medicine Symposium in Abu Dhabi, UAE.
  • September 2016:

    -- Our work on diffusive memristor synapses attracted broad media attention. A summary of the news outlets can be found here.
    -- Our paper "Memristors with diffusive dynamics as synaptic emulators for neuromorphic computing" was published in Nature Materials. Congrats to Zhongrui and all! Link to the paper: Wang et al., Nature Materials 16, 101-108(2017).
    -- Rui Zhang, Somnath Chakraborty and Siyan Lin joined our group. Welcome!
  • August 2016:

    -- Qiangfei gave a plenary lecture at the 5th Memristor and Memristive System Symposium in Dresden, Germany.
  • June 2016:

    -- Our paper "Sub-10 nm Ta Channel Responsible for Superior Performance of a HfO2 Memristor" was published in Scientific Reports. Congrats to Hao! Link to the paper: Jiang et al., Scientific Reports 6, 28525 (2016).
    -- Daniel Belkin (Swarthmore College) and Mohamed Mohamed joined our group as REU students. Welcome!
  • May 2016:

    -- Qiangfei gave an invited talk at ISCAS 2016 in Montreal, QC.
  • April 2016:

    -- Can was awarded the David H. Navon scholarship from ECE department. Congratulations!
    -- Our paper "Electrochemical metallization switching with a platinum group metal in different oxides" was accepted for publication in Nanoscale . Congrats to Zhongrui. Link to the paper: Wang et al., Nanoscale (2016).
    -- Qiangfei gave an invited talk at MELECON 2016 in Cyprus, and a seminar in KAUST.
    -- Shuang won the second prize in the 2016 ECE PhD poster session & Tang award. Congratulations!
  • Dec 2015:

    -- Xia and Yang groups celebrated Christmas in Joshua's house.
    -- Qiangfei gave a seminar in Skyworks Solutions, Woburn, MA.
  • Oct 2015:

    -- Qiangfei a co-program chair of the NNT'15 in Napa, CA.
  • Sept 2015:

    -- Qiangfei gave an invited talk at IMEC-Stanford RRAM workshop in Leuven, Belgium.
  • August 2015:

    -- Our work on nanoscale memristive RF switches was highlighted on DARPA website and other news outlets.
  • July 2015:

    -- Qiangfei gave an invited talk at IEEE DSP'15 and a seminar in Singapore University of Technology and Design (SUTD).
    -- Qiangfei's early tenure and promotion case was approved by the Provost and Chancellor.
  • June 2015:

    -- Our paper "Nanoscale memristive radiofrequency switches" was published in Nature Communications . Link to the paper: Pi et al., Nature Communications 6, 7519 (2015).
  • May 2015:

    -- Jonathan Scharf and David Lassalle joined the group as REU students. Welcome!
    -- The Senior Design Project (SDP) Team "Brainwave Manipulated Wagon (BMW)" advised by Qiangfei won the second prize at ECE annual banquet. Congratulations!
  • April 2015:

    -- Our invited perspective was highlighted in IOP Labtalk website. Nanoimprint lithography: From nanofabrication to nanomanufacturing
    -- Our invited Perspective "Nanoimprint lithography 20 years on" was published in Nanotechnology in celebration of the 20th anniversary of Nanoimprint Lithography technology. Link to the paper: Xia and Pease, Nanotechnology 26, 182501 (2015).
    -- Our joint project on using memristor crossbar arrays unconventional computing kicked off in Rome, NY.
  • March 2015:

    --Qiangfei was chosen as the recipient of the Barbara H. and Joseph I. Goldstein Outstanding Junior Faculty Award by the College of Engineering. (News is here .)
  • February 2015:

    -- Our invited review paper "Nanoimprint lithography enables memristor crossbars and hybrid circuits" was published in Applied Physics A. Link to the paper: Xia et al., Applied Physics A (2015): 1-13.
  • January 2015:

    -- Qiangfei gave seminars in Heidelberg University and TU Dresden.
    -- Almoatazbellah (Moataz) Hegab joined the group as a PhD student. Welcome!
  • December 2014:

    -- Xia Group celebrated Christmas in Qiangfei's house.
  • October 2014:

    -- Our collaborative paper "Black Phosphorus Radio-Frequency Transistors" was published in Nano letters . Link to the paper: Wang et al., Nano Letters 14, 6424-6429(2014).
  • September 2014:

    -- Dr. Zhongrui Wang joined the group as a post-doctoral research associate. Welcome!
    -- Dr. Moon Hyung Jang joined the group as a post-doctoral research associate. Welcome!
    -- Qiangfei gave an invited talk in IWS3TW and a seminar in Unicamp.
    -- Our recent work was highlighted in IOP Labtalk website. Integrating planar memristors with CMOS circuits.
  • August 2014:

    -- Our paper "3D integration of planar crossbar memristive devices with CMOS substrate" was accepted for publishing in Nanotechnology. Link to the paper: Peng Lin et al., Nanotechnology 25, 405202 (2014).
    -- Qiangfei gave an invited talk in PIERS (Progress in Electromagnetic Research Symposium) and a seminar in South University of Science and Technology of China (SUSTC), Shenzhen.
  • July 2014:

    -- Qiangfei gave a keynote talk at the 4th Memristors and Memristive Systems Symposium in Nortre Dame, IN
    -- Hao gave an invited talk at the 14th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA'14) in Notre Dame, IN
  • June 2014:

    -- Qiangfei gave a seminar at NIST.
    -- Our paper "Concentric rings of polystyrene and titanium dioxide nanoparticles patterned by alternating current signal guided coffee ring effect" was published in Applied Physics Letters. (Link to the paper: Jinhua Mu et al., Applied Physics Letters 104, 261601 (2014). )
    -- Qiangfei gave an invited talk at the 2014 ISCAS in Melbourne.

  • May 2014:

    -- The Xia group attended the 58th EIPBN conference in Washington, DC and presented 5 papers, including an invited talk given by Can Li.

  • April 2014:

    -- Hao received the David H. Navon scholarship from ECE department. Congratulations!
    -- Peng received an Outstanding TA Award from ECE department for his excellent work as an ECE 571 TA. Congratulations!
    -- Our paper "Single- and bi-layer memristive devices with tunable properties using TiOx switching layers deposited by reactive sputtering" was published in Applied Physics Letters. (Link to the paper: Hao Jiang and Qiangfei Xia, Applied Physics Letters 104, 153505 (2014). )

  • March 2014:

    -- Qiangfei was awarded a grant from the Commercial Ventures and Intellectual Property (CVIP) Technology Development Fund from UMass System. (News is here .)

  • November 2013:

    -- Xia Group celebrated Thanksgiving in Qiangfei's house.
    -- Our paper "Improvement of resistive switching uniformity for TiO2-based memristive devices by introducing a thin HfO2 layer" was published in Journal of Vacuum Science & Technology B. (Link to the paper: Hao Jiang & Qiangfei Xia, J. Vac. Sci. Technol. B 31, 06FA04 (2013). )
    -- Xueling Zhao joined the group. Welcome!

  • October 2013:

    -- Our paper "Cross point arrays of 8 nm x 8 nm memristive devices fabricated with nanoimprint lithography" was published in Journal of Vacuum Science & Technology B . (Link to the paper: Shuang Pi et al, J. Vac. Sci. Technol. B 31, 06FA02 (2013). )
    -- Shehzeen Hussain joined the group. Welcome!

  • September 2013:

    -- Gabriela (Ela) Correa joined the group. Welcome!

  • Auguest 2013:

    -- Qiangfei gave an invited talk at the DARPA RF-FPGA PI meeting, Ann Arbor, MI.

  • July 2013:

    -- Our paper "Low voltage resistive switching devices based on chemically produced silicon oxide" was published in Applied Physics Letters. (Link to the paper: Can Li et al, Applied Physics Letters 103, 062104(2013). )
    -- Our paper "Mold cleaning with polydimethylsiloxane for nanoimprint lithography" was published in Nanotechnology (Link to the paper: Peng Lin et al 2013 Nanotechnology 24 325301)
    -- Qiangfei gave a seminar in Nanjing University.

  • June 2013:

    -- DARPA UPSIDE (Unconventional Processing of Signals for Intelligent Data Exploitation) program officially kicked off, we are part of the team led by BAE systems.

  • May 2013:

    -- The Xia group attended the 57th EIPBN conference in Nashville, TN, and presented 7 papers.
    -- Qiangfei gave a seminar at IBM Watson Research Center in Yorktown Heights, NY.

  • April 2013:

    -- Peng received the David H. Navon scholarship from ECE department. Congratulations!
    -- Qiangfei gave two seminars at the U.S. Naval Research Laboratory (NRL) in Washington, DC.

  • March 2013:

    -- Our paper "Effect of voltage polarity and amplitude on electroforming of TiO2 based memristive devices" was published in Nanoscale. Hao Jiang & Qiangfei Xia, Nanoscale, 2013, 5, 3257-3261 is the link to the paper.

  • February 2013:

    -- Matthew Wojick joined the group. Welcome!

  • January 2013:

    -- The Xia group went to Mt. Snow, VT for a snowboarding trip to celebrate the New Year.
    -- Qiangfei received an NSF CAREER Award. UMass Amherst press release is here.

  • December 2012:

    -- The Xia group celebrated Christmas Day with a party hosted by Qiangfei.
  • September 2012:

    -- Shuang and Peng both won the ECE Graduate Student Travel Grant.
    -- Shuang and Peng presented two papers at the International Conference on Nanoimprint and Nanoprint Technologies in Napa Valley, CA.

  • August 2012:

    -- Can Li joined the group. Welcome!
    -- Qiangfei gave an invited talk at the 3rd Memristors and Memristive Systems Symposium & 13th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA'12) in Torino, Italy.

  • July 2012:

    -- Qiangfei was elevated to SPIE Senior Member.
  • June 2012:

    -- Qiangfei was elevated to IEEE Senior Member.

  • May 2012:

    -- Qiangfei received a DARPA Young Faculty Award (YFA). Official press release is here. UMass Amherst news is here.
    -- Shuang won the David H. Navon scholarship from ECE department. Congratulations!
    -- Chris went to UT Austin for PhD study. Congratulations!
    -- Zach joined IBM in Burlington, VT. Congratulations!

  • March 2012:

    -- Jinhua joined the group. Welcome on board!

  • February 2012:

    -- Qiangfei unveiled an "Art in Nanoengineering" exhibition at the Smith College Campus Center. News is here.

  • January 2012:

    -- We had a group dinner to celebrate the New Year at Sakura.

  • November 2011:

    -- Christopher Brennan joined the group. Welcome!

  • October 2011:

    -- We designed and built a multifunctional angle evaporation chuck!
    -- We designed and built our own nanoimprint alignment module!

  • August 2011:
  • -- Qiangfei gave seminars at Peking University, Institute of Microelectronics (Chinese Academy of Sciences), Huazhong University of Science and Technology, Shanghai Jiao Tong University and Fudan University.
  • July 2011:
  • -- Hao Jiang joined the group. Welcome!
    -- Qiangfei gave a seminar at Intel headquarters in Santa Clara, CA.
    -- MURI program officially kicked off in Santa Barbara on 7/7/2011.

  • June 2011:

    -- Yuchen Li joined the group. Welcome!
    -- Our group made our EIPBN debut in Las Vegas, NV. Shuang Pi gave a well-received oral presentation: "Arrays of 25x25 nm2 Cross-Point Resistive Switching Devices Fabricated with Nanoimprint Lithography".

  • Apr. 2011:
  • -- Our group is part of a team that is awarded a MURI (multidisciplinary university research initiative) grant for doing research on 3-D Hybrid Integration of CMOS/ Nanoelectronic Circuits. Official press release is here .
    -- Qiangfei gave a semniar at UMass Medical School in Worcester, MA.
    -- We built our own nanoimprint machine!

  • Jan. 2011:
  • -- Shuang Pi, Peng Lin and Zachary Henderson joined the group. Welcome on board!

    Some old news

    tumblr statistics