The 8 biggest mysteries about Earth

The mystery of the earth you don't know. You may be surprised to learn that dozens of spacecraft have mapped the surface of Mars even more accurately than the depths of the Earth's oceans. This fact implies, despite the advances and achievements in science and technology, people still do not understand the very planet we are residing. Here are 8 of the mysteries about Earth that have not been decoded.

>>> 3 mysteries about the Earth without an answer

Why is Earth wet?

Scientists believe that Earth is a dry rock after being formed 4.5 billion years ago. So, where does water (H2O), the essential chemical come from? The answer may be an interstellar distribution system, in the form of large-scale collisions about 4 billion years ago. The Earth can be supplemented with its reservoirs during the period of continuous impact with ice meteorites. However, the origin of water on our planet is still a mystery because there is not much evidence left from this period.

What in the core of the Earth?

The composition of the Earth's core that is still inaccessible remains a mystery, at least in the 1940s. Based on the discovery of meteorites, scientists have speculated about the initial balance of the minerals needed. set of Earth and indicate missing things. Iron and nickel are absent in the planet's crust, so it is conjectured to be in the Earth's core. However, gravity measurements in the 1950s revealed that these conjectures are inaccurate. Earth core is too light.

Today, researchers continue to speculate on factors that lead to a lack of density below the Earth's crust. They are also confused by the periodic reversals in the Earth's magnetic field, which originates from the shift of liquid iron in the outer core layer.

How does the moon form from Earth?

Was it a terrible collision between Earth and a Mars-sized planet that formed the Moon? There is still no global consensus on this large collision theory, because some details are not clear. For example, the similar chemical composition of both stone bodies implies, the moon is born from the Earth, not from a separate collision. Even so, a young, fast rotating Earth could emit enough molten rock during the collision to form a moon with a similar chemical composition, according to other research models.

Where does life on Earth come from?

Does life arise on Earth or originate in the interstellar space and is brought here by meteors? The most basic components of life, such as amino acids and vitamins, have been found on ice particles inside asteroids and in the harshest environments on Earth. In order to find out how these components combine to form the first life, it is still one of the greatest challenges of biology. We have not detected any direct fossil traces of the first inhabitants of Earth, which could be the original rock chewing bacteria.

The origin of oxygen on Earth?

Our existence depends on cyanobacteria, the microorganisms that help fundamentally transform the Earth's atmosphere. They release oxygen and make the atmosphere full of oxygen for the first time about 2.4 billion years ago. However, the stone revealed, the oxygen concentration increased - dropping like a roller coaster for 3 billion years, until it was stabilized in the Cambrian period, about 541 million years ago. So, did the bacteria decide the air component or did there be another impact factor? Finding this answer to this mystery is an important factor in deciphering the life history on our planet.

The cause of the Cambrian explosion

The emergence of a complex life form in the Cambrian period, after the first 4 billion years of Earth history, marks a unique turning point, according to geologist Donna Whitney of the University of Minnesota (USA). . Suddenly, the Earth has animals with brains and blood vessels, eyes and hearts, all evolving faster in any other time known to date. The jump in oxygen levels just before the Cambrian boom was considered a cause, but other factors could also explain the mysterious rise of animals, such as racing. armed between predators and prey.

When did stratigraphic tectonics begin?

Thin pieces of the crumbling Earth's crust create majestic mountains and intense volcanic eruptions. However, geologists still do not know the timing of the collision of stratigraphic tectonics. Most of the evidence has been ruined. Only a handful of small mineral particles called zircon minerals existed 4.4 billion years ago, and they tell scientists that the first continental-like rocks existed. However, the evidence for the first stratigraphic building is still controversial. Geologists are still skeptical about how the continental crust formed.

The root causes and stops the earthquake?

Statistical models can create forecasts of future earthquake likelihood, similar to hydro-meteorological experts warning about the coming rain. However, that does not help people escape failure to predict the next match. Even the best test predicted a 12-year deviation, when geologists conjectured a major earthquake that would occur in Parkfield, California, USA in 1994, and set up tools to deal with it. . Still, the actual earthquake occurred in 2004. One of the biggest obstacles is, geologists still don't understand why earthquakes start and end.