First, we can plant more flowers and plants. It can purify air, carries on the photosynthesis, carbon dioxide into oxygen, trees can save a lot of ground water, prevent soil erosion, solid earth, also can withstand the sand. How important the trees are! We can think of environmental prote...
Part of Hall of the Universe. The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock
Diluvian rain started to lash the surface, it rained for millions of years, and the first oceans formed. Yet barely had they appeared than they could have just as quickly evaporated.洪积的雨开始冲击表面，雨下了几百万年，第一个海洋形成了。然而，它们刚一出现，就很快地蒸发了。The difficult bi...
These gases should therefore have been important parts of the original atmospheres of both Venus and Earth. Much of the water on both planets is also thought to have come from impacts from comets, icy bodies formed in the outer solar system. [#paragraph2]In fact, water probably once ...
The water first? Yeah. Tell me when.先是水吗？是的，告诉我什么时候加。Then I'll add the methanol. Yeah, okay.然后我会加入甲醇。好。This icy material is similar to that of which the newly formed comets were composed. Next, the artificial comet's long journey is simulated in fast-...
launched the Initiative for Belt and Road Partnership on Green Development together with 31 countries, formed the Belt and Road Initiative International Green Development Coalition with more than 150 partners from 40-plus countries, and established the Belt and Road Energy Partnership with 32 countries...
For starters we know that the geophysical and climatological history of the Earth would have been different. Although there is still large uncertainty about how the Moon was formed, the most currently favored theory describes a disastrous collision between the Earth and another planetary object.”(...
But just because a particular mineral is found on, say Mars or Venus, we really shouldn't assume that whatever caused it to turn up there, must be the same process that formed that mineral here on Earth.
The Earth is thought to be over 4.5 billion years old. The first life that appeared on Earth was about 3.77 billion years ago. We cannot definitively say what the first organism was; our educated guess is that it must have been a prokaryote....
The first molecules necessary forlifeon Earth could have been created when tiny flickers of “microlightning” between drops of water sparked the necessary chemical reactions. “This is a new way to think about how the building blocks of life were formed,” saysRichard Zareat Stanford University...