In just a year, the zoo's two polar bear cubs have gone from just a pound at birth to about 250 pounds each. Elephant lovers should not miss the Baby Elephant Cam at the Pittsburgh Zoo in Pennsylvania. Elephants typically weigh at least 200 pounds at birth. Based on this information, calculate approximately how much weight an elephant gains per day. This particular satellite records the colors of Earth.
Blues are water, while greens indicate the presence of plants and plankton around the globe.
You can now look directly at the Sun without the fear of going blind. Follow daily weather patterns across the Pacific and Atlantic oceans. Check out the construction of NASA space vehicles. In addition to providing a bird's-eye view of our planet, Web cams bring the most distant cities to our doors. They also let us see more of our own country.