The real risk is for pseudoscience, not mood swings or tsunamis
An exoplanet holds its massive rings together with a backwards-spinning mechanism
NASA takes it seriously but Elon Musk is undaunted
An explanation of the theory that sparked the physicist’s career
New images of Pluto may hold clues to the origin of life on earth
Sandy Ong • November 2, 2015
New Horizons’ next stop is a small icy body a billion miles away
If there’s water on Mars, the Arctic hints there may also be life.