Relief sculpture is sculpture that protrudes from a flat surface or plane. These sculptures can be made out of earth, stone or other various hard substances, and they are often carved into the sides of buildings or other objects. Keep Learning.
A scientists takes a sample of water from a mine deep underground in Ontario, Canada. The water turned out to be 2.6 billion years old, the oldest known water on Earth. Credit: B. Sherwood Lollar et al. Last month, scientists announced they had found an ancient pocket of water buried in a mine 2 miles below Earth's surface. The water, up to 2.6 billion years old, may have been around longer even than multicellular life. The find raises intriguing possibilities for understanding how life arose on Earth and if it could survive on other planets. But the really burning questions is, of course, what does it taste like?
As it happens, a study last August discovered that water had existed on Mars for 200 million years longer than previously thought. What's more, there was life on Earth the same time as some of the last lakes on Mars. NASA/JPL-caltech/University of Arizona.