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. Our current climate regime -â a regime weâve had for the past ~2 million years â- is characterized by long periods of ice ages and shorter warm periods. The last ice age ended about 12,000 years ago, and since then weâve been in a warm period. Some argue that global warming is no concern, since the Earth will naturally switch back to an ice age. This is very likely to be true: an ice age is almost certainly in our planetâs future. But itâs a question of when. Our current concerns about climate change focus on the coming decades to the next century â- the time period relevant to our childrenâs and grandchildrenâs experience.