The Himalayas are a mountain range in Asia that stretches for about 1,500 miles (2,400 kilometers) through parts of India, Nepal, and China. The Himalayas are the highest mountain range in the world, with many of its peaks reaching elevations of over 8,000 meters (26,000 feet).
It is difficult to determine an exact optimum human population for the earth, as there are many factors to consider and different perspectives on what constitutes an ideal population size. The earth’s carrying capacity, or the maximum number of people that the earth’s resources can sustainably support, is determined by a variety of factors, including the availability of resources such as food, water, and energy; the impact of human activities on the environment; and the level of technological development.
On December 15, 1970, the Soviet Union’s Venera 7 spacecraft landed on Venus’ surface and became the first spacecraft to perform a soft landing on another planet. It also transmitted information to Earth for 53 minutes, 23 minutes of them from the Venusian surface, another first in the history of space exploration (the first data transmission from another planet).
Most people know that mountains are tall, rocky formations that jut up from the Earth’s surface. However, fewer people know how these behemoths are actually formed. In short, there are five main ways mountains can form:
Yes, the sun rotates on its axis. The sun is a giant ball of gas and plasma, and like most objects in space, it rotates. The sun takes about 25-35 days to complete one rotation on its axis, depending on the latitude. This rotation also plays a role in the creation of the sun’s magnetic field, which in turn drives phenomena such as solar flares and sunspots.
Stars, planets, and moons are round because of the force of gravity acting on them. Gravitational forces cause matter to clump together, and the more mass an object has, the stronger its gravitational forces will be. When a large amount of mass is concentrated in a single object, such as a star or planet, the force of gravity causes it to take on a spherical shape, since gravity always pulls toward the center of mass. This is why stars, planets, and moons are round objects.
No, the Sun will not become a black hole. Black holes are incredibly dense objects that are formed when very massive stars collapse in on themselves at the end of their lives. The Sun is not massive enough to become a black hole. Instead, it will eventually exhaust its supply of hydrogen fuel and expand into a red giant. After it shreds its outer layers, it will shrink down into a white dwarf.
Crocodiles really produce tears. But, they do not cry in the same way that humans do. They do not produce tears to show emotions like sadness or happiness.
Crocodiles generally avoid confrontations with hippopotamuses because they are much larger and more aggressive than crocodiles. Additionally, hippopotamuses live in groups, which makes it difficult for crocodiles to hunt them. Crocodiles typically hunt smaller, easier prey such as fish, birds, and mammals.
On December 4, 1996, Mars Pathfinder, a robotic spacecraft that was designed primarily to demonstrate a low-cost way of delivering a set of science instruments and a free-ranging rover (Sojourner) to the Martian Surface was launched from Cape Canaveral on top of a Delta II rocket.