Two pythons: evolution of snakes When did snakes evolve? Snakes evolved from lizards only about 150 million years ago, during the Jurassic Period. This is during the time of the dinosaurs, about the [...]
A llama in Bolivia - llamas live in South America Where did llamas come from? Llamas evolved from camels. Camels evolved in North America about 45 million years ago. They lived in the [...]
European boys at school in the 1800s More schools and more scientists In the first half of the 1800s AD, countries in northern Europe like France and Britain forced other countries to give them [...]
Jesuits after 1700 : Jesuit teachers in Brazil Jesuits become very powerful By the 1700s AD, the Jesuits owned a lot of farms and mines in countries all over the world. The governments [...]
David Hume, the European philosopher Who was David Hume? Soon after Hobbes and Locke died, starting in 1739 AD, David Hume published more important books about philosophy. Hume disagreed with Descartes' idea that people did what [...]
Geological eras: Fossil spider from the Cretaceous era Why do we have geological eras? Geologists divide the history of the Earth into eons and eras. That's so they don't have [...]
Proteins are a type of molecule made mainly out of hydrogen and carbon atoms. They are combinations of smaller molecules called amino acids. The first amino acids probably developed into proteins more than four [...]
The virus that causes AIDS (greatly magnified) HIV image copyright Russell Knightley Nobody is quite sure whether viruses are living things or not. The first living things may have come [...]
Flowering plants: Lavender flowers smell wonderful! Before there were flowers... For millions of years, the Earth was covered with ferns and pine trees and moss and mushrooms, without any flowers, grass, [...]
Seaweed in the ocean For the first two billion years of life on Earth, there were only one-celled creatures. But after early eukaryote cells started to reproduce by meiosis in addition to [...]
