(Phys.org) —Is it possible that a moving object could have zero energy? The common sense answer is no, since motion itself is kinetic energy, but this answer has been challenged recently by the concept of quantum time crystals. ...
The explosion of animal life on Earth around 520 million years ago was the result of a combination of interlinked factors rather than a single underlying cause, according to a new study.
Earth Sciences
Sep 19, 2013
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An analysis of sulfide ore deposits from one of the world's richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7 billion years ago, but also shows that microbes were actively feeding on sulfate ...
Earth Sciences
Dec 10, 2012
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Scientists have found the "Rosetta Stone" of supervolcanoes, those giant pockmarks in the Earth's surface produced by rare and massive explosive eruptions that rank among nature's most violent events. The eruptions produce ...
Earth Sciences
Sep 21, 2009
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About 7,000 years ago, the first farmers in the western Mediterranean selected the most fertile land available, cultivated cereal varieties very similar to today's, and made sparing use of domestic animal feces, as they do ...
Archaeology
Jul 30, 2024
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More than 15 years after the discovery of fast radio bursts (FRBs)—millisecond-long, deep-space cosmic explosions of electromagnetic radiation—astronomers worldwide have been combing the universe to uncover clues about ...
Astronomy
Jul 28, 2023
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Human activity is currently driving a loss of natural diversity that some experts describe as the sixth major mass extinction event in the history of the Earth. The decline in insects is particularly alarming: Insects are ...
Evolution
Apr 21, 2023
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In the Late Viking Age, a grave was built that looks very similar to one of the most spectacular graves of the Roman Age in Norway.
Archaeology
Oct 18, 2022
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A team of archaeologists and geographers from The University of Manchester have discovered that hundreds of ancient animal and human footprints found on a beach in Merseyside record a major decline in large animal diversity ...
Ecology
Sep 26, 2022
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Trapped in tree resin and preserved as in a time capsule: fossils enclosed in amber yield detailed insights into the anatomy of long extinct species. LMU zoologists Prof. Joachim T. Haug and Dr. Carolin Haug have discovered ...
Evolution
Aug 22, 2022
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