It is a big feat to estimate the number of trees on Earth! Satellite images can tell you a lot about the forest area and canopy cover, but they cannot see individual trees. In 2005, one group converted that coverage …
Melted chocolate in an American scientist’s pocket in 1946 led to the development of an appliance that changed the way many of us cook our meals today. Percy Spencer, a researcher at Raytheon in Waltham, Mass., was testing communications equipment when he …
When we use powerful telescopes to look at distant objects, such as stars, galaxies, and quasars in space, we are actually looking back in time. We can only see an object if light from that object reaches us. Some of …