Frogs Escape Slowly Heated Water

Healthy frogs will try to escape water as it becomes dangerously hot, contrary to the famous boiling frog myth. In 1869, German physiologist Friedrich Goltz helped inspire the tale when he found that a frog with its brain removed remained in slowly heated water, while an intact frog tried to escape at 25 degrees Celsius. Other 19th-century experiments produced conflicting results because researchers used different heating rates. Modern biologists conclude that a healthy frog with an escape route will become increasingly active and eventually jump out.

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