Variation in the recovery of tetrapods after the Permian extinction opened the door for dinosaurs and mammals

The end-Permian mass extinction (EPME) occurred about 250 million years ago and represents the Earth's most catastrophic extinction event.

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New dinosaur discovery suggests new species roosted together like modern birds

The Mongolian Desert has been known for decades for its amazing array of dinosaurs, immaculately preserved in incredible detail and in associations that give exceedingly rare glimpses at behavior in the fossil record.

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Some plasma instabilities can extinguish themselves

A physicist has for the first time used advanced models to accurately simulate key characteristics of the cyclic behavior of edge-localized modes, a particular type of plasma instability. The findings could help physicists more fully comprehend the behavior of plasma, the hot, charged gas that fuels fusion reactions in doughnut-shaped fusion facilities called tokamaks, and more reliably produce plasmas for fusion reactions.

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DNA detectives crack the case on biothreat look-alikes

Biological "detectives" are tracking down biothreats such as the bacteria that causes tularemia ("rabbit fever"), but they constantly face the challenge of avoiding false positives. Sounding the alarm over a bioattack, only to find it's a harmless relative in the same genus, reduces credibility and public trust. New work is narrowing down the confusion over Francisella bacteria, a few species of which include highly virulent human and animal pathogens, fish pathogens, opportunistic human pathogens, tick endosymbionts, and free-living isolates inhabiting brackish water.

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DNA sensor plays critical role in cancer immunotherapy via response to unexpected DNA form

Researchers report for the first time that tumors stressed by cancer immunotherapy release their mitochondrial DNA into nearby immune cells, triggering a host alert system.

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