This US Defense Advanced Research Projects Agency(DARPA) artists rendering shows the Falcon Hypersonic Technology Vehicle 2 (HTV-2).
Credit AFP/Getty Images
The forces on the unmanned hypersonic glider tested last summer by the U.S. Defense Advanced Research Projects Agency (DARPA) were so great that large parts of its skin peeled off causing its emergency system to plunge it into the ocean.
As we reported last August, the Falcon HTV-2 "was shot up on a rocket and right at the edge of space, it separated and glided through the atmosphere at 13,000 mph."
Gorillas are fine with being herbivores, like this one at a Seattle zoo. But humans evolved as omnivores. Is diet destiny?
Credit Ted S. Warren / AP
If diet is destiny, then modern humans should thank our ancestors for their ability to eat just about anything.
Two new studies peek into the distant past to try to figure out just how big a role food played in human evolution. One says that eating meat made it possible for early human mothers to wean babies earlier and have more children.