New Book Reveals Why We Need An Exoplanet Reality Check
Is Earth really exceptional?  A new book seems to reaffirm that notion.  But given the right conditions, primitive life may be a mere byproduct of biophysics.
Spacefarers may contaminate other worlds – but scientists have plans to keep the cosmos clean
The US wants to put a flag on Mars. But there’s a risk it could carry unwanted stowaways that might compromise future ...