Life
- Ecosystems
Fish stocking may transmit toad disease
Hatchery-raised trout can transfer a deadly fungus to western toads, bolstering the view that fish stocking may play a role in amphibian population declines.
- Paleontology
Neandertals, humans may have grown apart
A controversial fossil analysis finds that the skulls of Neandertals and humans grew in markedly different ways.
- Animals
Roach gals get less choosy as time goes by
As their first reproductive peak wanes, female cockroaches become more like male ones, willing to mate with any potential partner that moves.
- Paleontology
Study picks new site for dinosaur nostrils
A new analysis of fossils and living animals suggests that most dinosaurs' nostrils occurred at locations toward the tip of their snout rather than farther up on their face, a concept that may change scientists' views of the animals' physiology and behavior.
- Animals
Don’t look now, but is that dog laughing?
Researchers have identified a particular exhalation that dogs make while playing as a possible counterpart to a human laugh.
- Paleontology
For past climate clues, ask a stalag-mite
Mites fossilized in cave formations in the American Southwest show that at times during the past 3,200 years the climate there was much wetter and cooler.
- Animals
Condor chicks hatch in zoo and wild
Newly hatched California condor chicks indicate that reproduction is again taking place in the wild.
- Animals
Microbe lets mite dads perform virgin birth
A gender-bent mite—in which altered males give birth as virgins—turns out to be the first species discovered to live and reproduce with only one set of chromosomes.
- Animals
Fruit flies hear by spinning their noses
Drosophila have a rotating ear—and odor-sensing—structure that's new to science.
- Paleontology
Two new dinosaurs chiseled from fossil gap
A sleek predator and a pot-bellied giant dinosaur have emerged from North American rocks to fill in a 30-million-year gap in the dinosaur fossil record.
- Paleontology
Sahara yields second-largest dinosaur
Excavations near an Egyptian oasis have unearthed the fossils of an animal that probably ranks as the second-most-massive dinosaur known.
- Paleontology
Fossil footprints could be monumental
Trace fossils found in a vacant lot in a small town in Utah, including the footprints of meat-eating dinosaurs, could soon be protected as part of a new U.S. national monument.
