American science after colonization
European trade goods (thanks to Nebraska Game and Parks Division) North American people made rapid scientific advances in the course of the 1500s AD, inspired by contacts with traders and [...]
European trade goods (thanks to Nebraska Game and Parks Division) North American people made rapid scientific advances in the course of the 1500s AD, inspired by contacts with traders and [...]
What is electricity? A bolt of lightning in the sky What is electricity made of? Everything in the universe is made of atoms. Those atoms are made of electricity. Atoms are [...]
A pearl inside an oyster Very early in human history, maybe around 100,000 years ago, many people lived along the coasts of Africa and lived mainly on seafood - seaweed, [...]
Plastic water bottles There are thousands of different kinds of plastic, from shopping bags to Fisher-Price toys to photographic film, CD's, and plumbing pipes. Some plastics, like chewing gum or [...]
Sand castle by the ocean If you want to see some real silica, go to the beach or to a playground with a sandbox. Beach sand (which is also what [...]