Foods to Avoid. When youâre feeling a bit wired, avoid foods containing caffeine, alcohol, sugars, and processed ingredients. Caffeine is a stimulant that can produce a jittery feeling that might amp up your anxiety.
The Ice Ages began 2.4 million years ago and lasted until 11,500 years ago. During this time, the earthâs climate repeatedly changed between very cold periods, during which glaciers covered large parts of the world (see map below), and very warm periods during which many of the glaciers melted.
Ice Ages: Timeline. Past 1,000,000 years. Past 150,000 years. Using chemical information collected from ice cores and from shells of organisms preserved in deep-sea sediments, geologists have been able to map out how Earth's climate has changed over time. Climate swings between cold periods, called glacials, and warm periods, called interglacials.