New exoskeleton is lighter and cheaper

Vanderbilt engineers have developed an exoskeleton for people paralyzed below the waist that they say is more compact and cheaper than existing versions.

Super-eruptions can develop super-fast

Supervolcanoes may be able to form in just a few hundred years - far, far more quickly than previously believed.

'Jumping genes' revise view of evolution

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