科学与环境
Pompeii’s 2,000-year-old eruption just gave scientists a better clock for Earth’s past
来源: All Top News -- ScienceDaily · 发布于
Mount Vesuvius’ famous 79 CE eruption has given scientists a remarkably precise benchmark for dating events deep in Earth’s past. The improved technique could sharpen the timelines of volcanic eruptions, asteroid impacts, extinctions, and other major moments in geological history
Mount Vesuvius’ famous 79 CE eruption has given scientists a remarkably precise benchmark for dating events deep in Earth’s past. The improved technique could sharpen the timelines of volcanic eruptions, asteroid impacts, extinctions, and other major moments in geological history.
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Earth’s day isn’t exactly 24 hours. The reason may lie deep inside the planet
Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the inner core appear to tug on the mantle, revealing a surprisingly dynamic world thousands of kilometers beneath our feet.
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Scientists may have misread a 2-billion-year-old clue about Earth
Scientists have found that a famous 2-billion-year-old chemical signature, once thought to record a massive global change in Earth’s carbon cycle, may instead have been produced by local magma, hydrocarbons, and methane-eating microbes. The discovery raises new questions about wh
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Scientists burned their own scrolls to unlock a 2,000-year-old mystery
Scientists discovered that tiny amounts of lead in ancient ink can make writing inside burned papyrus scrolls stand out dramatically in X-ray scans. The technique could help unlock lost Greek and Roman texts preserved by the eruption of Mount Vesuvius nearly 2,000 years ago.
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Sugar found in meteorites may have helped secure its own survival on early Earth
Is there life elsewhere, or is Earth unique in the universe? This is one of humanity's great unanswered questions. One way to approach this mystery is to investigate how life began here on Earth. Our research explores the conditions in which a mixture of molecules somehow transfo
Phys.org - latest science and technology news stories ·
Earth and Mars: Built from different cosmic recipes
Four and a half billion years ago, Earth and Mars were born in the rotating cloud of gas and dust that would eventually become our solar system. Yet exactly how the planets formed remains one of the most disputed questions in planetary science.
Phys.org - latest science and technology news stories ·