Science Birthdays, October 19

Today is the birthday of Walter Cannon, born in 1871, he discovered using x-rays to study the digestive system by feeding a patient a Bismuth meal. He also discovered the concept of homeostasis.  He coined the phrase flight or fight response

Today is also the birthday of Chandrashekhar, born in 1910, he discovered the Chandrashekhar limit which is 1.5 times the mass of our sun, anything over that would result in a supernova.

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