South American environment
The Andes mountains run down the Pacific side of South America South America is a long, narrow continent running from the equator down nearly to the South Pole. So the north [...]
The Andes mountains run down the Pacific side of South America South America is a long, narrow continent running from the equator down nearly to the South Pole. So the north [...]
The Pharaoh's daughter picks Moses up out of his basket (synagogue at Dura Europos, Syria, 200s AD) The Book of Exodus According to the Book of Exodus in the Bible [...]
Emily Dickinson I'm Nobody (1891) I'm nobody! Who are you? Are you nobody, too? Then there's a pair of us--don't tell! They'd banish us, you know. How dreary to be [...]
Aristophanes: Greek krater bowl for mixing water and wine, with a scene from a comedy on it (Probably the Tarpoley Painter, about 400 BC) Political comedy Aristophanes (arr-iss-TA-fa-knees) lived in [...]
Dragonfly When was the Carboniferous period? With the end of the Devonian period about 359 million years ago, the Carboniferous period got started. More about the Devonian Quick summary of [...]
Fish eggs: Egg evolution starts with soft eggs like these When did the first eggs evolve? The earliest living creatures made babies by dividing themselves in half, so that one [...]
A fish skeleton Before there were bones One-celled animals don't have any support system that holds them in a certain shape. Plants do have a support system, but it's the [...]
Fish gills The first cells, which evolved about 3.8 billion years ago, needed carbon dioxide to live and not oxygen. They needed the carbon dioxide to help them break down [...]
Reproduction: Hydra budding new hydras RNA and DNA molecules The first form of reproduction began about four billion years ago, when first RNA molecules and then DNA molecules began to make [...]
Whale intestines (from Medicine Chest) When did intestines evolve? The first animals to have anything like an intestine evolved around 548 million years ago. These were roundworms, just a few [...]