National Science Foundation
National Science Foundation: Living Ink: Sustainable Ink Made From Algae
Living Ink Technologies is using synthetic biology to develop sustainable ink with algae. [1:40]
Khan Academy
Khan Academy: Trig Challenge Problem: Multiple Constraints
In this video [12:48] Sal solves a very complicated algebraic trig problem that appeared as problem 47 in the 2010 IIT JEE Paper I exam.
Science Friday Initiative
Science Friday: Designing a Bridge for Earthquake Country
Inside the world's longest self-anchored suspension bridge being built in quake-prone San Francisco Bay.