By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
Condoms were originally made of animal intestines or linen.
347
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Cats and dogs can hear ultrasound.
350
Early American humans hunted car-size armadillos and used their shells for houses.
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