The most important boundary in the universe. To host life as we know it, a planet must be ...
If it can live here, could it live on Mars or Europa? By studying the toughest life on Ear...
Thriving in pools of acid and lakes of salt. While most life needs a neutral environment, ...
Meet the "Water Bear," the ultimate survivor. These microscopic creatures can su...
Some organisms think "boiling" is the perfect temperature. Found in volcanic spr...
Ecosystems that thrive without a single ray of sunlight. Deep on the ocean floor, life gat...
Weight and speed are perfectly linked in space. If you know how fast a moon is traveling, ...
Planets don't maintain a constant cruise control. An orbiting body picks up speed as i...
How long does it take to finish one lap? From the 88-day sprint of Mercury to the century-...