The InSight lander has caught a large 'earthquake' on Mars - Science News for Students

This magnitude 5 quake is offering scientists a peek at what’s going on beneath the Martian surface.

contract: To activate muscle by allowing filaments in the muscle cells to connect. The muscle becomes more rigid as a result. (in commerce) An agreement between two parties, such as to make a purchas… [+2068 chars]

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