A NASA X-ray telescope reveals an unusual ring of eight black holes.
Why are climbing vines overgrowing tropical forests in the Americas?
New finds enter the debate over where humans first settled in the Americas.
Watch mind and machine merge.
Decoding the genomes of other species is critical to understanding our own.
A single-celled organism is found to sow and harvest crops of bacteria to sustain its colonies.
Conservation helps, but more must be done to reverse the decline of vertebrate species.
Does a shroud of energy from the Big Bang bear scars of other universes?
Another human species was alive at the time of Neanderthals.
For many vultures, scavenging has become dangerous business.