UW Today

Dinosaur predecessors gain ground in wake of world’s biggest biodiversity crisis — with photo gallery

Newly discovered fossils reveal a lineage of animals thought to have led to dinosaurs taking hold in Tanzania and Zambia, many millions of years before dinosaur relatives were seen in the fossil record elsewhere on Earth.

Some Alaskan trout use flexible guts for the ultimate binge diet

The stomach and intestines of certain Dolly Varden trout double to quadruple in size during month-long, salmon-egg-eating binges in Alaska each August. It’s the first time researchers have documented such fish gut flexibility in the wild.

‘True grit’ erodes assumptions about evolution

New work in Argentina where scientists had previously thought Earth’s first grasslands emerged 38 million years ago, shows the area at the time covered with tropical forests rich with palms, bamboos and gingers. Grit and volcanic ash in those forests could have caused the evolution of teeth in horse-like animals that scientists mistakenly thought were adaptations in response to emerging grasslands.

Mutant champions save imperiled species from almost-certain extinction

Species facing widespread and rapid environmental changes can sometimes evolve quickly enough to dodge the extinction bullet. UW scientists consider the genetic underpinnings of such evolutionary rescue.

Piranha kin wielded dental weaponry even T. rex would have admired — with video

Taking into consideration size, an ancient relative of piranhas weighing about 20 pounds delivered a bite with more force than prehistoric whale-eating sharks or – even – Tyrannosaurus rex.

Plumes across the Pacific deliver thousands of microbial species to West Coast

Microorganisms – 99 percent more kinds than had been reported in findings published just four months ago – are hitching rides in the upper troposphere from Asia.

Giving library pests the cold shoulder

UW librarians acted quickly to eliminate bedbugs in books last August.