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Authorities in the Argentine province of Mendoza announced that the mummified remains of an 8-year-old Inca boy will be returned to the place where they were found 37 years ago. ....
Samantha Leigh/California State Sharks have spiral-shaped intestines that work in a similar way to an unusual valve designed by Nikola Tesla. Studying their anatomy could help improve industrial fluid-pump technology. Most animals have tubular intestines that use muscle contractions to push food along like squeezing a tube of toothpaste. But sharks slowly channel their meals through spirals without needing muscles to push the food. Their intestines are also shaped in a way that only allows food to flow one way – like a performance-enhanced Tesla valve, says Samantha Leigh at California State University Dominguez Hills. “Sharks have all these different little tweaks to the Tesla valve design that could be making them more efficient,” she says. ....