Apollo-Soyuz 50th Anniversary: A Handshake in Orbit That Transformed the Space Race

The Apollo-Soyuz Test Project brought Soviet cosmonauts and NASA astronauts together in the first international human spaceflight.

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The Territory Is Tiny and So Is the Newborn Caterpillar Defending It

As they cling to leaf tips, newborn warty birch caterpillars produce vibrations that can ward off invaders approaching their millimeter-size domain.

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Earth’s Mini-Moon Was Probably a Piece of Its Real Moon

Scientists think a small rock discovered near Earth last August was hurled into space by an ancient impact on the lunar surface.

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