News
- Planetary Science
Warmth in the dark age
Lower reflectivity kept Earth from freezing under a fainter young sun.
- Life
Tortoise see, tortoise do
Though they rarely meet, solitary creatures can pick up skills by example.
- Planetary Science
Signs of giant comet impacts found in cores
An uptick in ammonium may be evidence of a 50-billion-ton strike at the end of the ice age.
- Physics
LHC revs up
The world’s most powerful atom smasher achieves its most energetic collisions yet.
- Health & Medicine
Identical twins may not be so identical when it comes to gut bacteria
A new study suggests that intestinal microbe populations vary widely from one person to another.
