IN THE BEGINNING

The story of life on Earth starts in the water. Without our oceans, life as we know it would not exist. For the first billion years, there was almost no life on Earth.

There were no trees, no birds, no insects, and no fish because there wasn’t enough oxygen in the atmosphere.

Almost three-quarters of the EARTH’S SURFACE is WATER. Did you know that your brain and heart are almost three-quarters water too?

The, 3.5 billion years ago, tiny creatures called cyanobacteria came along and everything changed.

TAKE A BREATH

How did cyanobacteria change our world? These tiny sea creatures made oxygen for Earth’s atmosphere. Using light from the Sun, they turned carbon dioxide and water into sugars, which they used as energy to grow. In the process, they breathed out the life-supporting gas oxygen. We call this special process photosynthesis.

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