0541 GMT January 19, 2020
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This creature eats stone; sand comes out the other end
Lithoredo abatanica is an organism with an unusual appetite: This creature eats stone. And when it excretes, what comes out is sand, the leftovers of a still-mysterious digestion process.
50 billion tons of sand used globally
Experts have said there is need to manage sand extraction to avoid huge environmental impact. It said that about 50 billion tons of sand and gravel are used around the world every year.
Toy cars help scientists understand how tires drive over sand
Thanks to a new scaling law, scientists can study the physics of tires traveling across sand by analyzing toy car models.
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