What is an alien's favorite game? All-star baseball! Scholars start defining living and non-living. Then, they conduct experiments to research if life exists, keeping in mind that life could be in many forms, not just human. 

The Galle crater on Mars is also known as the Happy Face crater because of its appearance. First, scholars use pebbles and flour to simulate craters and study their properties. They then apply this knowledge to help decipher the history...