Most sharks are Ecthoterms, cold-blooded fish. The Megalodon was a massive shark that went extinct 3.6 million years ago, and like some shark species, it was not a cold-blooded fish, it could keep its blood temperature about 7 degrees warmer than its surrounding water.
Photo by: https://commons.wikimedia.org/wiki/File:Carcharodon_megalodon_size_compasison_with_man.png
Snow flies are flightless flies in USA and Canada. Scientists discovered that snow flies can amputate their legs as a last resort to defend their
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Following you can see a Crusader fortress built in the 12th century near the banks of the Jordan River, in what today is Israel. It
