What happens when we breathe?

A cycle of life

Up in the sky the sun circles on its path from horizon to horizon, day by day, year by year. The sun is huge, 1,390,000 kilometers in diameter. You can fit 1,000,000 earths into the sun! And inside the sun a gigantic nuclear reaction is producing an unbelievable amount of heat and energy. A part of this energy radiates into the universe. High energetic particles and light. Eight minutes and 20 seconds after leaving the surface of the sun, after traveling 150 million kilometers through space, some of this energy arrives on our earth and gives you this warm feeling when it kisses your face on a sunny morning. But it also gives energy to virtually all live on earth, and the sun rays that stroked the skin of the dinosaurs 65 million years ago are now fueling your car or your commuter train when you go to work tomorrow morning.

Read more “What happens when we breathe?”