科学与环境
Comets probably didn't seed life on Earth after all, new study suggests
来源: Phys.org - latest science and technology news stories · 发布于
The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry many of these molecules. However, a new study challenges this idea.
The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry many of these molecules. However, a new study challenges this idea.
相关报道
The way Earth's 'thermostat' works may have changed during Pangea era
Life arose on Earth at least 3.5 billion years ago, and our planet has remained habitable ever since—not too hot, not too cold. These life-sustaining conditions are possible in part thanks to a built-in, carbon cycle–based climate "thermostat" that controls the amount of carbon d
Phys.org - latest science and technology news stories ·
Rosebank: Life on the oil field at the centre of a political storm
Scotland editor James Cook finds out what life is like on board a ship in an untapped oil field awaiting its fate.
feeds.bbci.co.uk ·
A rock plunged 90 kilometers into Earth and revealed something unexpected
Scientists discovered a rock in Papua New Guinea that plunged more than 90 kilometers beneath Earth's surface, revealing a bizarre temperature pattern that challenges established theories of Earth's interior. The unexpected shift from unusually hot to relatively cold conditions c
All Top News -- ScienceDaily ·
Researchers discover why some frogs have escaped the current amphibian mass extinction
Amphibians are the most threatened vertebrates on Earth, with 41% of species facing extinction. In the highlands of Central and South America, a killer fungus has wiped out much of the once-abundant amphibian diversity. Yet in the Sierra Nevada de Santa Marta, an isolated mountai
Phys.org - latest science and technology news stories ·
A 2,700-year-old solar eclipse just revealed something surprising about Earth
A solar eclipse recorded more than 2,700 years ago is revealing surprising secrets about Earth's rotation and the Sun's ancient behavior. By correcting an eight-kilometer error in the location of an ancient Chinese capital, scientists were able to reconstruct a total solar eclips
All Top News -- ScienceDaily ·