Team identifies clathrate ices in comet 67P

For decades, scientists have agreed that comets are mostly water ice, but what kind of ice—amorphous or crystalline—is still up for debate. Looking at data obtained by ESA's Rosetta spacecraft in the atmosphere, or coma, ...

Experts caution self-driving cars aren't ready for roads

Self-driving cars are more likely to hurt than help public safety because of unsolved technical issues, engineers and safety advocates told the government Friday, countering a push by innovators to speed government approval.

page 2 from 8