Saturn orbiter Cassini traveled nearly 5 billion miles on less than four tons of fuel
And there’s no way for you to know when it will start
The prescription of HIV-prevention pills has lagged, and negative biases towards patients could help explain why
From face cream to fertilizers, all sorts of products are under development to make use of soaring jellyfish populations
An iconic butterfly is in trouble – but how much trouble?
Living longer will shake up social institutions, experts say