Very intriguing site listing live statistics including world population, species extinct, forest lost, forest replanted and an oil depletion timer. Click on Population Counters (globe on the right) to see the populations on each continent as the globe slowly spins around. Very cool!
In this "Ask an Astronomer" episode (03:05), Dr. Carolyn Brinkworth fills us in on what the color of the sky has to do with finding life on distant planets.
No, not cockroaches and ants. These bugs are tiny, single-celled bacteria you can’t see. They blanket your skin. They also fill your stomach, intestines, lungs and mouth.
Don’t worry about being less than human, though. Bacterial cells are very small. All of these bugs make up only between 1 and 3 percent of your body weight.