Mollie Bloudoff-Indelicato is a science journalist who writes for such outlets as National Geographic, Everyday Health, and Scientific American. She was the #sciencechat guest on Wednesday, October 23, 2013.

Matt Hall, @kwinkunks, is a geologist turned geophysicist with Agile*. He was the #sciencechat guest on Wednesday, October 16.

Nazneen Rahman is a geneticist in the UK who finds genes that predispose to cancer and use them to help patients. She was a guest on #sciencechat on Wednesday, September 11, 2013.

Alessandro Vespignani, a world-renowned expert in network science, was a guest on #sciencechat on Wednesday, August 21, 2013.

In a special #sciencechat we look at some of the facts and figures of the College of Science at Northeastern University.

In a special #sciencechat we look at some of the facts and figures of the College of Science at Northeastern University.

Nick Polanchik, a rising second year biology major and math minor, was an Orientation Leader over the summer. On Wednesday, August 7, during #sciencechat, he answered questions about what students can expect when they arrive on campus in just a few weeks.

Deanna Church is a staff scientist at the National Institutes of Health where she works on genome assembly. She was a guest of #sciencechat on July 31, 2013 where she talked about how she got interested in her work, the challenges, and the victories.

Toyoko Orimoto, a particle physicist, is a collaborator on the CMS Experiment at CERN and an assistant professor at Northeastern University.

During #sciencechat on July 17 the @NortheasternCOS account tweeted several fun science facts.

Incoming Marine Biology professor Mark Patterson talks about studying science underwater.

Jeremy Casson, the interim director of Student Services in the College of Science at Northeastern University, tries to calm the nerves of some incoming students.

Albert-László Barabási fielded questions about how someone or something becomes successful - it's not always because he or it is the best.

Chris Gunter, aka @girlscientist, was the #sciencechat guest on June 5, 2013.