Related: 10 devastating signs of climate change from space How well do you know Earth? Take the Earth Day quizzes to find out. Earth Day is an annual event that started in 1970 when 20 million ...

How do astronauts return home? Tim Peake and Fran Scott explore how astronauts make the trip from the International Space Station back to Earth. Tim Peake: Ask an astronaut Select from the list of ...

and extensions needed to make it easy to implement Down To Earth projects and activities in your learning space. 💪 Mission Stellar Health: Train Like An Astronaut, by Sandy Roberts Get ready to train ...