Physicists can use bright, hot lasers to slow atoms down so much that they measure -459 degrees Fahrenheit.
'Normal' body temperature varies from person to person by age, time of day, where it's measured, and even menstrual cycle. External conditions also influence your thermometer reading.
Mammals' ancestors had a third eye and the fossil record of its disappearance tells us the story of the evolution of one of our most important features: warm blood.
Dinosaurs may have been warm-blooded and active, contradicting theories that suggest they were cold-blooded and sluggish…