Lucy's 3 million-year-old bones were found in 1974, but they're still yielding new clues.
When is public transport free in Paris? When pollution gets out of hand
December 8, 2016, 12:54 p.m. by Sami Grover
Facing health alerts over smog and pollution, Paris tries to get its citizens out of their cars.
Stores dim the lights, quiet down for autistic shoppers
December 8, 2016, 12:41 p.m. by Jenn Savedge
It's an opportunity for kids with autism to shop without the commotion.
Why wild giraffes are suffering a 'silent extinction'
December 8, 2016, 10:54 a.m. by Russell McLendon
The iconic animals have declined more than 40 percent in 30 years, potentially facing extinction yet drawing little global attention.
Science has measured all of humanity's 'stuff' and it's absolutely enormous
December 7, 2016, 3:22 p.m. by Michael d'Estries
This technosphere, as it's called, is reshaping our planet in new ways.
Meet SALTO, the tiny robot that jumps better than you
December 7, 2016, 2:17 p.m. by Noel Kirkpatrick
This tiny robot can fit in the palm of your hand — and then leap straight off of it.