Alpha Centauri or Bust
By Steve Nadis
The nearest star system is 4.37 light-years away. But an ambitious and innovative new idea - involving lasers and nanospacecraft - could get us there in the next 40 years.
By Jessica Marshall
In the middle of the Bering Sea, off the coast of Alaska, sits an island that was once home to a special population of mammoths. Now, researchers are digging deep to reconstruct the past and unearth the cause of the creatures' demise.
By Kenneth Miller
Most doctors fight cancer from the outside with radiation and chemotherapy. But James Allison is fighting it from the inside by hacking patients' immune systems. The results are changing the cancer game.
By Robert Moor
Etched into stone in the Canadian province of Newfoundland are the earliest traces of trails made by a living organism. Those first steps may have set an evolutionary course that changed everything.