One view: It actually depends on the age of the embryo in the egg. An older embryo will warm the egg and the egg will stay warm longer. If you feel of the eggs and they are losing warmth, she has probably abandoned her nest. She knows the age of the chick and how long the eggs can be without her.
Fifty Degrees Below was created in 2005.
Fifty-five degrees fahrenheit.
-76 degrees
The ISBN of the book "Fifty Degrees Below" by Kim Stanley Robinson is 978-0-553-58788-7.
121 degrees.
90-94 degrees celsius
-70.06 degrees Fahrenheit.
58ºC = 136.4ºF
150ºF = 65.6ºC
Up to fifty-five degrees Celsius {=135 degrees Fahrenheit}
about fifty degrees Fahrenheit
131