Fossil evidence of how the earliest life on Earth came to be is hard to come by. But scientists have come up with a few theories based on the microbes, viruses and prions existing today.

An astronomer takes us on a tour of the universe to learn about the birth of stars and planets and how they get their spin.

Birds and dinosaurs lived together for millions of years, but only toothless birds survived the asteroid impact that upended life on Earth.

Day to day, sunshine might not affect our mood – but light and dark seasons do.

Starting at the surface, you would have to dig nearly 2,000 miles before reaching the Earth’s core. No one could survive that trip – and the 10,000-degree F heat once there would vaporize you anyway.

Some animals have belly buttons that are easy to see, but others have ones that are more difficult to spot.

Rainbows are made when water droplets split light up into colours.

Astrology and astronomy were once practiced side by side by scientists like Galileo and Kepler. And they’re more similar than you might think.

Pictures and sound, flying through the air to a box in your house? Back in the 1940s, it seemed like a miracle.

Many galaxies are too faint or small for us to observe easily – but science can help us work it out.