Researchers integrate optical devices made of multiple materials onto single chip

Zeroing in on the origins of Earth’s 'single most important evolutionary innovation'

Zeroing in on the origins of Earth’s “single most important evolutionary innovation." A new study shows oxygenic photosynthesis likely evolved between 3.4 and 2.9 billion years ago.

Garrett Reisman, former NASA engineer that went to work at SpaceX, talks about the differences between the two. “[At SpaceX] we would make a decision in a single meeting that would take years to reach the same decision point at NASA,” he says.