Paleontology: Fever Chart for Fossils. 3 minute read. ... Thus, he reasons, they should have been able to adapt to the warmer temperatures that heralded the end of the ice age, ...

Here's what you need to know about normal body temperature numbers by age, plus what range constitutes a fever and when to treat it or call a doctor.

The temperature that constitutes a fever varies slightly by age and where on the body someone takes the temperature. Usually, though, an oral temperature over 100.4°F (38°C) counts as a fever.