How plesiosaurs swam underwater

Researchers at the Arecibo Observatory are helping to unravel the mystery of surprising asteroids

When the 2019 OK asteroid suddenly appeared on Earth on July 25, 2019, Luisa Fernanda Zambrano-Marin and the team at the Arecibo Observatory in Puerto Rico jumped into action. After receiving a warning, the radar scientists zoned in on the asteroid, which came from the Earth’s dead spot – solar opposition. Zambrano-Marin and the team …

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