The earth entered an ice age, how long can humans live

The Earth entered an ice age.

Humanity will not become extinct, but the population may be greatly reduced.

Main factors: 1. The decrease in sunshine in the summer half of the year is the main reason. Changes in the amount of sunshine in the summer half year and eccentricity of the Earth's orbit.

Intersection of the ecliptic plane and the equatorial plane and precession.

3 parameters are related to the change.

2. The luminosity of the sun when it moves near the galactic center is the smallest, which cools the planets and forms the Great Ice Age on Earth.

The Earth has entered an ice age, and humanity will not become extinct, but the number of people may be greatly reduced.

After the Earth enters the Ice Age, the average temperature of the Earth will drop significantly, resulting in most of the current farmland in temperate regions being uncultivated, and global food production will be greatly reduced. Populations also migrate from mid-high latitudes to lower latitudes. Hunger and war will cause a significant decline in the global population.

But humanity will not become extinct because there are also tropical regions and oceans that can provide food and resources for people.

During the Ice Age, humans, like other animals, had a long hibernation period, reducing their activity to store energy, and humans lived in groups in caves for long hibernation, so they could survive.

During the Ice Age, human food was mainly meat captured by powerful tools, and the use of animal fur and fire made humans not afraid of the cold, so only humans lived a relatively moisturized life during the Ice Age.

The way humans survived the Ice Age: there were human activities, humans could move south, and they could live in areas that were not reached by glaciers by the help of mountains and rivers. In its long geological history, the Earth has experienced three periods of continuous temperature decline, which geographers refer to as the Ice Age.

The ice ages of the Precambrian and Paleozoic eras lasted tens of millions of years, while the Cenozoic ice ages lasted two million years. There is still no definite theory about the genesis of the Ice Age, but some scholars believe that it may be related to the decrease in sunlight exposure due to the periodic change of the angle of inclination of the Earth's axis during the Earth's rotation.

During the Ice Age, the temperature dropped and changed the plant phase and the living environment of organisms on the earth's surface, and many creatures faced extinction or forced migration, and only species that could adapt to the environment survived. The stones in the vast area bear signs of abrasion, which are left by the passing of ice blocks.

Ice ages, also known as glacial periods, are periods in which the Earth's land and oceans were covered by ice during certain ages, and these ice areas were much larger than the areas that are now covered by ice. During the Ice Age, ice covered large swathes of the world's land, and the climate in these regions was very cold; There is a lot of ice in the ocean, and the ground is also covered with thick ice. At the same time, sea levels are lower because more water is stored in ice.

Ice ages can last more than a million years, and there have been 11 ice ages since the formation of the earth, the last ice age is called the "Great Ice Age", which occurred 18,000 years ago, and the knots and pants were tied 10,000 years ago, when about one-third of the earth's land was covered under 240 meters of ice.