In 1988, Tesla published a scientific article in which he explained the induction motor, his greatest invention. Its main objective was to generate motion in the motor by means of rotating magnetic fields produced by a polyphase alternating current.

The liger is a hybrid feline whose progenitors are male lions and female tigresses; while the tigon is also a hybrid feline, resulting from the union of the male tiger and female lioness.

Sharks need very little depth to attack their prey; many times they only need 30 cm of water and even go where they are not completely covered by water.

Octopuses are believed to have alien DNA, as their genetics show evidence of the influence of extraterrestrial viruses on terrestrial evolution. Their genome is complex with 33,000 more protein-coding genes than Homo sapiens. It is believed that modern octopuses are descendants of species that arrived on Earth frozen on a comet.

The Democratic Republic of Congo is the country with the most child soldiers in the world, as more than 30,000 children are believed to be incorporated into armed groups.

The Phoenix bird is an emblematic mythological creature of fire that is capable of being reborn from its own ashes. This creature is associated with the resilience that many people have, the ability to find solutions to adverse situations that life presents them with.

The Anihilin pistol is capable of vanishing the enemy just by pulling the trigger; and the Miraquirol, a miraculous pill is a panacea made from the leaves of a plant called Swarnaparni.

The leopard and the cheetah are two big cats with very similar spotted fur, but with notable differences, including the fact that the cheetah has fine black lines running from the tear trough to the corner of the lips. Although both species have a mottled yellow coat, the cheetah's black spots are small and round, while those of the leopard are rectangular. Also, the cheetah is a light and slender animal, with a morphology adapted to reach great speed, while the leopard is a corpulent and muscular feline. Another difference between these felines is that the cheetah is an animal of the African savannah, while the leopard is a highly adaptable animal and is distributed from Africa to Southeast Asia,

When Darwin arrived in the Galapagos Islands, he was particularly impressed by the finches. He noticed that these birds had a different beak, which made him think that the species were not stable, but changed their physical characteristics to adapt to the pressures of the environment. This is how the British naturalist began to shape his theory of evolution.

Johannes Gutenberg in 1440 invented the printing press, which allowed him to print the Gutenberg Bible, which was printed with a total of 42 lines per page.