Dan Nosowitz is PopSci.com's Associate Editor. He has previously written for Fast Company, SmartPlanet, the Billfold, and Splitsider, and got his start at the gadget blog Gizmodo. He is also the founder and editorial director of Oh Em Gee., a pop culture criticism collective based in Montreal. Dan holds an undergraduate degree in English literature from McGill University. You can follow him on Twitter.
Ricin is one of the most poisonous substances on Earth, it's scarily easy to make, and somebody is mailing it to the President and at least one U.S. senator. What it is, how it works, and more, inside.
According to NBC News, law enforcement is now saying that the bombs used in the attack on the Boston Marathon were constructed of pressure cookers filled with shrapnel. This is a common and low-rent bomb, typically made from a bit of TNT or other explosive in a sealed pressure cooker. They can be triggered remotely, and the pressure cooker itself turns into shrapnel.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.