By Heidi Harley

science / science - 6 years ago

Slowdown in US air quality gains: study

Air quality has largely improved over the past several decades in the United States, but those gains have slowed substantially since 2011, an international study said Monday. The report in the Proceedings of the National Academy of Sciences found a stark difference between estimates and reality whe...

science / science - 6 years ago

Jeff Bezos explains how his space company will save civilization

Amazon founder Jeff Bezos has shed new light on what’s driving him to invest billions in his space technology company, Blue Origin. Both he and rival rocket-maker Elon Musk have long been clear that their investments in space are mission-driven. Bezos has talked about his lifelong enthusiasm for a f...