China has the largest population in the world, although the surface was only slightly smaller than the United States. Go through the daily Knowledge Check and build up your Dreevoo score.
Mars is the most explored and well know planet so far, so you shouldn't have to much trouble knowing some of its facts. Go through this short quiz and build up you Dreevoo knowledge profile.
Fish is daily protein source for 1.2 billion people, but fishers are more and more frequently returning home with empty nets. Watch this amazing animation and find out how you can help prevent overfishing.
