After a sweat gland squirts, it takes about 9 seconds for that sweat gland to fill up and squirt again.
Dinosaur had lungs of a fast killer
Dinosaur had lungs of a fast killer Researchers believe that the skeleton of a
Scipionyx dinosaur recently found bears the fossilized image of
some of its internal organs, including powerful lungs. They think
that it was probably cold-blooded but had the metabolic capacity of
a modern mammal or bird. It is the best-preserved dinosaur fossil
ever found.
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