What are planets? The planet Venus from space Before there were planets For several hundred million years after the Big Bang, there were no planets, only stars. Planets couldn't form until the [...]
Mercury from space Which planet is Mercury? Mercury is the closest planet to our Sun. At some parts of its orbit, Mercury is only about 46 million kilometers away from the sun. The [...]
This statue by Praxiteles shows the Greek god Hermes playing with the infant Dionysos(300s BC) What is Hermes the god of? Hermes is a god of boundaries, borders and edges. [...]
Chinese science: a double-action piston box bellows (China) What are some Chinese inventions? Chinese scientists started inventing a lot of new things around 500 BC, during the Warring States period. [...]
A big ocean wave The first molecules of water formed out in space, about 14 billion years ago, as part of the nebula left over after an early star exploded [...]
Diagram of a mercury atom. Thanks to Open Door for this image Along with gold, lead, and uranium, mercury is one of the heavier kinds of atoms. Every atom of [...]
Unfortunately, you should not play around with mercury because it can be poisonous. It's hard to get these days anyway, now that they don't sell mercury fever thermometers anymore. But you can [...]
