The flow of carbon on our planet, known as the carbon cycle, is amazingly complex. Here's a quick look at how carbon flows among different areas on the Earth and how humans have potentially contributed to global warming.

Have you ever wondered how an airplane flies? This video explores the basic physics behind how aircraft fly. Hopefully the next time you find yourself cruising along in an airliner, miles in the sky, you'll appreciate the wonders of flight.

Jet engines help airliners fly across continents. They power military aircraft faster than a speeding bullet. Have you ever wondered what gives a jet engine its power? This video takes a closer look at how turbofan engines operate.