Global Warming is a "hot" topic. This video looks at the evidence and focuses on these two questions; Is the Earth getting warmer? and What ARE the effects of Carbon Dioxide in the
atmosphere? Check it out, the answers may surprise you.
Engineers from NASA's Jet Propulsion Laboratory and students at the California Institute of Technology have designed and tested a versatile, low-mass robot that can rappel off cliffs, travel
nimbly over steep and rocky terrain, and explore deep craters.