Dragon and the crew will launch to a 90° circular orbit from Florida, and travel to ~440 km above Earth to explore the polar regions of our planet": SpaceX ...

In this diagram, the red lines represent the edges of the tectonic plates that make up the Earth's crust. For example, iron is mined from the Earth's crust in quarries. It is a finite resource ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right ... and generators to operate. In the Earth (see image below right), the ...

Earth is our home planet, and it's the only place in the universe where we know for certain that life exists. Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished ...