It seems that the blueprint for complex brain development remains the same, despite 500 million years of divergent evolution.
A 9-year-old girl from Maryland, who has collected more than 400 fossilized shark teeth, discovered a 5-inch megalodon gnasher on Christmas Day.
Depression can affect people of all ages, races and socioeconomic classes.
These hypothetical stars are the densest objects in the universe that can exist without becoming full-fledged black holes.