Viruses 'fourth major branch of life'

Viruses are ancient living organisms and not inanimate molecular remnants, new research indicates, and should be regarded as a fourth major branch of life.

Please know nothing about this movie

With the new Terrence Malick film, The Tree of Life, it's been reported that stars Sean Penn and Brad Pitt want you to know nothing about the movie going in, and supposedly it's not an easy one to explain regardless.

'Jumping genes' revise view of evolution

The 'tree of life' model of evolution may turn out to be more tangled and overgrown than thought.