Safe distance: supernova SN 1987A as seen by the ESO Schmidt Telescope. Located 168,000 light-years away, this object posed no danger to Earth. (Courtesy: ESO) The explosion of a nearby star could ...
This is a preview. Log in through your library . Abstract Populations of colonial organisms offer the possibility of partitioning their morphologic variability into within-colony and among-colony ...
A long, long time ago — between 378 million and 375 million years ago — about half of all species on the planet vanished. The trigger for this mass extinction, one of five known in Earth's history, ...
The first African fossils of Devonian tetrapods (four-legged vertebrates) show these pioneers of land living within the Antarctic circle, 360 million years ago. The first African fossils of Devonian ...
Most scientists think the dinosaurs — along with countless other creatures — were wiped out some 66 million years ago when a space rock slammed into Earth. But a cosmic impact isn’t the only disaster ...
The late Devonian extinction, about 370 million years ago, is one of the 'Big Five.' It killed up to 80 percent of species, obliterating the lavish Devonian coral reef ecosystem. The final pulse in ...
A mass extinction of fish 360 million years ago hit the reset button on Earth's life, setting the stage for modern vertebrate biodiversity, a new study reports. The mass extinction scrambled the ...
The Middle Devonian (Givetian) microconchid tubeworm species known as Spirorbis angulatus Hall, 1861 is redescribed here on the basis of a new collection from the Traverse Group of Michigan and ...
Scientists have unearthed South African fossils of prehistoric Devonian Period amphibians believed to be the earliest known four-legged vertebrates at a site called Waterloo Farm in Grahamstown. The ...
Climate change and asteroids are linked with animal origin and extinction – and plate tectonics also seems to play a key evolutionary role, ‘groundbreaking’ new fossil research reveals. The discovery ...
A paper released this week by University of Illinois Urbana-Champaign astronomy and physics professor Brian Fields makes a case for distant supernovae as a cause of a past mass extinction ...
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