[__ Science __ ] #4 Faint Sun Paradox

[AIG.com]

Evidence now supports astronomers’ belief that the sun’s power comes from the fusion of hydrogen into helium deep in the sun’s core, but there is a huge problem.

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[Barbarian]

In fact, paleogeochemical evidence shows that the Earth was frozen over billions of years ago. However, the "paradox" is now in question, as new evidence has accumulated:

San Antonio — June 22, 2016 — In the first billion years of Earth’s history, the planet was bombarded by primordial asteroids, while a faint Sun provided much less heat. A Southwest Research Institute-led team posits that this tumultuous beginning may have ultimately fostered life on Earth, particularly in terms of sustaining liquid water.

“The early impacts caused temporary, localized destruction and hostile conditions for life. But at the same time, they had a long-term beneficial effect in stabilizing surface temperatures and delivering key elements for life as we know it,” said Dr. Simone Marchi, a senior research scientist at SwRI’s Planetary Science Directorate in Boulder, Colo. He is the lead author of a paper, “Massive Impact-induced Release of Carbon and Sulfur Gases in the Early Earth’s Atmosphere,” recently published in the journal Earth and Planetary Science Letters.

Scientists find possible solution to “faint young Sun paradox”

Bombardment triggered atmospheric warming capable of sustaining liquid water

sservi.nasa.gov