Europe
Asia
Oceania
Americas
Africa
The mysterious appearance of oxygen on the o
Some people think that the seas hold the key to protecting the planet.
Two contrasting visions of humanity’s future in space
WONDERS OF THE OCEAN
Mars once had vast oceans on its surface. Then its magnetic field weakened, its atmosphere thinned, and its water vanished. But the numbers don’t add up. For the Red Planet to have transformed from a
SPACE
f you’ve ever read anything about cosmology, you’ll have come across an astonishing statistic: all the matter around us, everything we see and touch, every star and gas cloud and planet, makes up just
