"Evolution"

The length of the giraffe's tongue can reach more than 40 cm, usually, they only need to use their flexible tongue to avoid the hard thorns of the acacia tree, and then gently roll, you can eat the leaves

It is proposed that birds originated from dinosaurs, and that "ancestor birds" are a transitional species between birds and dinosaurs.

Most of the plants that we think are delicious have actually been artificially selected for hundreds or even thousands of years

In the Milky Way, the closest stars to the Sun are 4.22 light years away

Theoretically, life can take many different forms, such as silicon-based life, sulphur-based life, carbon-based life, amino-life, hydrogen-based life, etc. However, so far we only know that life exists on earth, and all known life, including us humans, is carbon-based.

In the world of insects, a variety of successful strategies have been developed to avoid dying from the cold

Sloth monkeys, the world's only poisonous primates

In the evolutionary history of human beings, the gradual increase in brain volume is an important marker