Nearly 90% of the United States population has at least one caffeinated beverage every day. Learn about the chemistry of caffeine, how it causes increased alertness and focus, and how caffeine is capable of causing overdoses.
Pangolins are believed to be the most trafficked mammals in the world. As the four Asian species of pangolins have dwindled, poachers are increasingly turning to the African species to supply the trade.
On this remote island in Costa Rica, a wildlife sanctuary protects nesting grounds for the Magnificent pergat, fregat bird, also called pirate birds. Witness the nesting of these birds that have extraordinary wingspans and can soar for weeks.
At any moment, about 2,000 thunderstorms are occurring worldwide. Learn how thunderstorms form, what causes lightning and thunder, and how these violent phenomena help balance the planet's energy and electricity.