How hateful alt-right trolls hijacked your timeline

You don't need to get attacked by a pro-Trump troll-bot horde to know that social media is a battleground for propaganda farms. It's pretty obvious, and miles of speculative digital ink has been spilled saying as much. An Oxford study this week is ge…

MIT: Carpooling services could replace most NYC cabs

Researchers have proved mathematically what you probably already knew: Carpooling services are more efficient, less polluting and less costly than traditional taxis. Using data from three million New York City taxi rides, a team from from MIT's CSAIL…