According to experiments, lichens can grow at a low temperature of-273 degrees Celsius, survive in vacuum for six years, and survive at a temperature twice as high as boiling water. So it can grow in desert, South Pole, North Pole, and even on the back of big turtles.

Why does lichen have such tenacious vitality? After long-term research, people finally found the "answer".

It turns out that lichen is not a simple plant, it is composed of two kinds of plants, one is fungi and the other is algae.

Fungi have a strong ability to absorb water and inorganic substances. Algae have chlorophyll. It uses water, inorganic substances absorbed by fungi and carbon dioxide in the air as raw materials, and uses sunlight for photosynthesis to make nutrients, which are shared with fungi. This close cooperation is the secret of lichen's tenacious vitality.