8 results for “water on Mars”
Planets & the Solar System
Mars
water froze into the ground or escaped. Mars still holds a great deal of water as ice: in the polar
Article · 4 min read
Planets & the Solar System
The Moon
water. The best explanation is dramatic. About 4.5 billion years ago, when Earth was newly formed, a planet the size of Mars
Article · 4 min read
Space & the Universe
Exoplanets: Worlds Around Other Stars
water to exist on the surface, neither boiling nor frozen? That band is called the habitable zone. Earth sits in the Sun's. Dozens of roughly Earth-sized planets have been found
Article · 3 min read
Planet Earth
The Oceans
Water covers 71 percent of the planet, mostly in darkness and under crushing pressure. We have mapped the surface of Mars
Article · 4 min read
Space & the Universe
Space Exploration
Mars, studying rocks for signs of ancient water and life. The two Voyager spacecraft, launched in 1977, flew
Article · 3 min read
Life & Biology
The Origin of Life
water. It was not the first living thing, but it is the one from which everything descends. Reading the oldest rocks The oldest convincing fossils are stromatolites, layered mounds built by mats
Article · 4 min read
Planets & the Solar System
Comets, Asteroids and Pluto
Mars and Jupiter circle well over a million known asteroids, with countless more too small to catalogue. Films show spaceships dodging through dense fields of tumbling rock, but the belt is mostly
Article · 4 min read
Planet Earth
The Atmosphere
Water vapour varies from almost nothing over deserts to about four percent over tropical seas. That mixture is unlike any other planet's. Venus and Mars
Article · 4 min read
