The biggest asteroid to ever hit the earth

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New findings about the biggest asteroid to ever hit the earth, 2 billion years ago, came to light. The asteroid was 25 Km in diameter, and not 15 Km like previously thought. It had hit Africa and created the Vredefort crater.

 

Photo by: https://pixabay.com/photos/asteroid-comet-meteorite-3628185/

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Birds self medicate with plants

Researchers in Madrid tested the droppings of great bustard birds and found their diet contained a significant amount of 2 plants with antiparasitic effects. These

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