Science without borders， but scientists have the motherland。
We're having summer while the earth is far from the sun? Isn't it supposed to get colder the farther away you are?
The Earth is always revolving around the Sun. Because the Earth's orbit is elliptical, the distance between the Earth and the Sun is not constant. Sometimes the Earth is farther from the sun, sometimes it is closer.
If large carnivores go extinct, must the ecosystem collapse?
Either because of their large size or because humans are at the top of the food chain, we pay more attention to large carnivores that are also higher up the food chain. As a result, we subconsciously believe that large carnivores are more important in the ecosystem than small, herbivorous animals. One cannot help but wonder if the ecological balance will be upset if large carnivores become extinct, and if the ecosystem will eventually become irreparable and collapse.
Why is the silly and unreturnable tilapia not extinct by now?
The silly fish living in the sea, even if the predator nibbles, there is no way to escape, so silly and no power to fight back fish, why is not extinct until now? This fish is called a tilapia, it is slowly moving forward in the water, a seal in its vicinity, slowly approaching the tilapia, after seeing the right moment, the tilapia is a bite, directly biting out a defect, the tilapia can only silently bear, the predator's attack, without the power to fight back, become a "walking buffet ".
The Trailblazer has made a new friend on Mars! Old friend the Wit is having problems and is about to be abandoned
The Trail rover traveling near the western deltaic remains of Mars' Jezero crater recently unintentionally made a new friend, a new friend born and raised on Mars, and an old friend, the Mars Helicopter of Wit, who keeps having problems and may be on the verge of being abandoned.
How do owls do silent flight? Do you know how many species of rare owls there are?
Owls lie during the day and come out at night, and their presence to us is two words - mysterious. Their ears grow in different places on their heads to distinguish different sounds. Their eyes are filled with false eyeballs that cannot be rotated, but they have unusually good vision and can easily judge distances. Their necks can rotate 270 degrees, giving them an unobstructed view of the hunting area. What's more, they can silently swoop down on their prey. How exactly do owls do this? Today, Tao Tao Notes brings you those things about owl flight, so let's take a look at some rare owl species.
7.5 billion kilometers away, New Horizons returned a photo, carrying a message out of the solar system
Since the 1970s, NASA has been launching space probes, what is a space probe? Simply put, it is the final destination of these probes, not in the solar system, but will carry the expectations of all mankind, leaving the solar system, even until they run out of energy, but also in the vast universe, carrying the message of human civilization.
Wake up, Venom, you unqualified villain, your strong enemy is coming
As the villain Venom is very unqualified, it has its independent mind, but it must be dependent on the host. This limits much of its character. For example, Venom in the movie "Deadly Guardian", was originally an alien life, brought to Earth by humans and then began to look for a host. After a misstep, it found the most suitable host, Eddie Brock.
Only in the zoo of the South China tiger, 200 million years of living fossils in the water, China's 16 national treasures
After the Industrial Revolution, rapid economic development allowed humans as a whole to solve the problem of food and clothing. The dramatic increase in population forced humans to encroach on more natural resources, and the ensuing cost was more wildlife, which faced extinction or endangerment because of humans. According to scientific studies, the extinction of species has accelerated 100 to 1,000 times faster than natural selection in recent times, and a study in the Proceedings of the National Academy of Sciences reports that humans have caused the extinction of at least 543 species of terrestrial vertebrates throughout the 20th century. And it predicts that nearly the same number of species are likely to be extinct in the next two decades.
This planet has clouds but no rain, and humans are bent on exploring it, only to have 9 probes taken out
Last summer, China, Israel, and the United States all launched Mars probes, the first time in human history that three countries launched Mars probes in the same year, which set off a worldwide discussion about the exploration of Mars. When people are talking about the possibility of future human migration to Mars, how can we not think that another planet that has been more concerned than Mars a few decades ago, is Venus?
Can cats see in the dark like night vision goggles?
It is well known that the cat is known for its keen senses - especially its vision. But just how good are its eyesight? Can they see well in the dark? Is it similar to night vision goggles? Let's explore the cat's night vision in this issue.
Can mammals also be hermaphroditic? How do two-headed snakes, which may have one male and one female, live and reproduce?
Among many animals, there is one extremely special type of snake, they can be hermaphroditic, and this type of snake is called a two-headed snake. So, how do such snakes that share two heads of one body live and reproduce?