Neil deGrasse Tyson hears from Lance Armstrong about the science of drafting in cycling.
(02:08)Cyclist Lance Armstrong explains how performance enhancing drugs entered the world of endurance...
(02:03)Neil deGrasse and his guests discuss a variety of topics.
Images of some of StarTalk's celebrity guests.
The official Canadian page for National Geographic
Building for the future.
People, past and present.
A unique insight into the natural world.