Suchergebnisse
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Vor 2 Tagen · Abiogenesis. Stages in the origin of life range from the well-understood, such as the habitable Earth and the abiotic synthesis of simple molecules, to the largely unknown, like the derivation of the last universal common ancestor (LUCA) with its complex molecular functionalities. [1]
Vor 5 Tagen · photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Vor 4 Tagen · It is the movement of the fluid iron in the outer core that creates Earth’s magnetic field (see section 4.2). The outer core is 2300 km thick, and has a density of 12 g/cm 3. The mantle extends from the outer core to just under Earth’s surface. It is 2900 km thick, and contains about 80% of the Earth’s volume.
Vor 2 Tagen · One theory is that periods of increased geomagnetic reversals will weaken Earth's magnetic field long enough to expose the atmosphere to the solar winds, causing oxygen ions to escape the atmosphere in a rate increased by 3–4 orders, resulting in a disastrous decrease in oxygen.
Vor 2 Tagen · Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. Sustainability usually has three dimensions (or pillars): environmental, economic, and social. Many definitions emphasize the environmental dimension.
Vor einem Tag · Now 87, Sykes is still challenging ideas about the way Earth works. This February, he published a controversial paper about earthquakes along California’s San Andreas Fault, arguing that events such as the 1989 Loma Prieta quake that devastated San Francisco could have been predicted from signs occurring decades in advance. “In the future, knowing those signs can help us take steps to ...
Vor 5 Tagen · The Sun contains almost ALL of the material in our solar system. 99% of it. All the planets, asteroids and comets add up to less than 1% of the total. The Sun is so far away that it takes light about 8 minutes and 20 seconds for it to get to us – and light is the fastest thing in the universe.
