Saturn's moon Rhea has a mysterious material on its surface — Hydrazine, an inorganic compound, a colorless liquid with the same pungent smell as ammonia. Here on Earth, it is used in pharmaceuticals, agrochemicals, and as a propellant for spacecraft.
The 7 Rocky Earth-Size TRAPPIST-1 Planets Have Remarkably Similar Densities
Climate change will cause a shift in Earth's tropical rain belt — threatening water and food supply for billions, study says
