Life on planet Earth originated around 3.8billion years ago. First, the first microscopic organisms appeared in the water, then fish began to swim in it, and after that more advanced animals crawled out onto land. The world was constantly evolving and eventually you and I appeared. Throughout these billions of years, our planet has faced many terrible situations. Huge asteroids fell on it, volcanoes erupted, the composition of the atmosphere changed and entire continents collapsed. On top of all this, during this time, the Sun began to shine as much as 30% brighter. Despite all these disasters, the air temperature on our planet still remained suitable for life. Researcher Toby Tyrrell recently proved that the inhabitants of the Earth are very lucky. And all because our planet remained habitable only thanks to a fluke.
Disasters on Earth
The results of his scientific work werepublished in the scientific journal Nature Communications Earth & Environment. If you look at history, life on our planet has indeed often been on the verge of complete extinction. For example, millions of years ago, the air temperature on Earth dropped to such an extent that even areas on the equator line were covered with ice. But today the equatorial regions are considered one of the warmest in the world. But even in those difficult times, the oceans did not freeze, which saved the lives of many animals.
Some scientists believe that our planetpossesses a kind of "self-preservation instinct." As soon as the air temperature on Earth deviated greatly from the norm, the processes taking place on it returned the climate to an optimal state for the existence of life. But then the question arises - why do other planets have no such protective instincts? After all, the latest scientific discoveries hint that once upon a time there was water on Mars, and maybe even life. But something happened that turned the Red Planet into a lifeless place.
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Why are many planets uninhabited?
Considering the luck of the Earth and the absencegood luck with Mars, explorer Toby Tyrrell decided to find out - how many "happy" planets there are? To do this, he simulated 100 thousand planets on a supercomputer, each of which has its own laws. To put it simply, these laws determined how the planet would react to external influences such as the fall of large asteroids and so on. The laws for each planet were set by a random number generator. That is, each planet reacted to the disaster by either returning the damaged climate to its original state, or simply dying.
The history of the development of each of a hundred thousand planetsrepeated a hundred times. Every time they were launched, something happened to them that led to dramatic climate changes. The number of such disasters and their severity were again selected using a random number generator. In total, the researcher produced about 1 million climate stories, each of which lasted for 3 billion virtual years. If, after catastrophes, the planet could restore conditions suitable for life, it was considered as "happy" as the Earth. And if not, the planet was dying like Mars.
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Of the 100 thousand planets created, only 700were able to maintain livable conditions. Moreover, in half of the 100 climatic stories, they still died. This means that our planet could be one of the few who could save life after numerous disasters. At the moment, scientists already know potentially habitable planets with the same conditions as on Earth. Only in the future it may become clear that life on them has disappeared due to climatic changes. The closest of these planets may be Mars. Perhaps, soon we will find there traces of ancient creatures that died due to the planet's inability to recover from disasters.