11 Surprising Mysteries Scientists Can’t Explain

1. How do cats purr?

Felines always purr when they feel happy, however nobody knows exactly how or why. When cats purr, you don’t hear or feel their heart thumping!
Researchers say felines create the vibrating sound using their vocal chords. The frequency pitch helps accelerate healing and reduces any pain the cat may be experiencing. Cat’s often purr when they are stressed or carrying an injury.

2. Where did some creatures come from?

Numerous species don’t have any direct ancestors. Nobody knows precisely when amphibious creatures evolved to be able to live on land or develop limbs and heads.
It’s additionally said that dinosaurs were made extinct a apocalyptic catastrophe 65 million years prior. In the meantime,different types of warm blooded animals started appearing out of no where.

3. Do cows have a magnetic compass?

Some animals appear to use their magnetic sense as a map, compass, or compass calibrator. The compass method allows animals not only to find north, but also to maintain a constant heading in a particular direction. … Numerous studies use magnetic fields larger than the Earth’s field.

4. What was the “gelatinous” rain?

Star jelly (also called astromyxin, astral jelly) is a gelatinous substance sometimes found on grass or even on branches of trees.According to folklore, it is deposited on the Earth during meteor showers. Star jelly is described as a translucent or grayish-white gelatin that tends to evaporate shortly after having “fallen.” Explanations have ranged from the materials being the remains of frogs, toads, or worms, to the byproducts of cyanobacteria, to the paranormal.Reports of the substance date back to the 14th century and have continued to the present day.

5. What is dark matter?

Dark matter is a hypothetical type of matter distinct from baryonic matter (ordinary matter such as protons and neutrons), neutrinos and dark energy. … The standard model of cosmology indicates that the total mass–energy of the universe contains 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy.

The eight planets of the Solar System (by decreasing size) are Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars and Mercury. Since Pluto was excluded as an official planet, it’s believed there are eight planets.

7. Why are people right-handed and left-handed?

Handedness is a better (faster or more precise) performance or individual preference for use of a hand, known as the dominant hand; the less capable or less preferred hand is called the non dominant hand.Despite the common terminology of “left-handed” or “right-handed”, handedness is not a discrete variable (right or left), but a continuous one that can be expressed at levels between strong left and strong right.In between these extremes lie various degrees of mixed-handedness and ambidexterity.Men are somewhat more likely to express a strongly dominant left hand than women.Studies suggest that 88–92% of the world population is right-handed.

8. Why did megafauna become extinct?

The extinction of megafauna around the world was probably due to environmental and ecological factors. It was almost completed by the end of the last ice age. It is believed that megafauna initially came into existence in response to glacial conditions and became extinct with the onset of warmer climates.

9. Why do we dream?

There are many theories about why we dream, but no one knows for sure. Some researchers say dreams have no purpose or meaning and are nonsensical activities of the sleeping brain. Others say dreams are necessary for mental, emotional, and physical health.

10. What is the “space roar”?

ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission) carried seven sensors that picked up electromagnetic radiation like radio waves. … Instead, ARCADE detected a huge amount of radio noise—six times louder than scientists had predicted—which has since come to be known as the “space roar.”

11. Why do we have different blood types?

Human blood types most likely came to exist to fend off infectious diseases. The incompatibility of some blood types, however, is just an accident of evolution.

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