Mammals

After mass seabird death event, Australia warns of wider H5N1 bird flu threat

"Australians should expect to see more spread and larger numbers now of wildlife being affected," said Agriculture Minister Julie Collins.

A test tube labelled "Bird Flu", eggs and a piece of paper in the colours of the Australian national flag are seen in this picture illustration, January 14, 2023.
 New Dinosaur-era mammal species "Ravjaa ishii" discovered in Mongolia's Gobi Desert.

New Dinosaur-era mammal species "Ravjaa ishii" discovered in Mongolia's Gobi Desert

 With Romulus, Remus, and Khaleesi Colossal Biosciences revives the dire wolves.

With Romulus, Remus, and Khaleesi Colossal Biosciences revives the dire wolves

 Dryolestes, a Late Jurassic relative of the Cretaceous therians.

Flowering plants, not dinosaurs, drove mammals to ground 72 million years ago


Ancient whale from Peru may be most massive animal ever on Earth

Whales evolved a bit more than 50 million years ago from hoofed, land-dwelling mammals as big as a medium-sized dog.

 Perucetus colossus, an early whale from Peru that lived about 38-40 million years ago, a marine mammal built somewhat like a manatee that may have exceeded the mass of the blue whale, long considered the heftiest animal on record, is seen in an undated artist's rendition.

Dinosaur vs mammal: Dramatic fossil shows pugnacious mammal attacking a dinosaur

"Here, we have good evidence for a smaller mammal preying on a larger dinosaur, which is not something we would have guessed without this fossil," Mallon added.

Fossilized skeletons dating to about 125 million years ago from China showing the entanglement of the dinosaur Psittacosaurus lujiatunensis and the mammal Repenomamus robustus are seen in this 2022 handout photograph. Scale bar equals 10 cm.

Dramatic fossil shows pugnacious mammal attacking a dinosaur

"Dinosaurs nearly always outsized their mammal contemporaries, so traditional belief has been that their interactions were unilateral - the bigger dinosaurs always ate the smaller mammals."

 Cretaceous carnivorous mammal Repenomamus robustus attacking the plant-eating dinosaur Psittacosaurus lujiatunensis

Why males have lower-pitched voices - study

A new study finds that large group size and mating systems in which males have multiple mates drove the evolution of lower-pitched voices in primates.


Ohio researchers use CAT scan to test felines’ sense of smell

The authors said that their findings deepen their understanding of how the evolution of more convoluted channels enabled mammals’ - especially cats’ - enhanced sense of smell.

A JERUSALEM alley cat.

16 cats killed by bird flu in Poland as global outbreak continues

The infected cats were found in locations separated by hundreds of kilometers.

 A cat in a basket (Illustrative)

An endangered seal became a celebrity on Israeli beach for 5 days, locals want her back

A rare 6-foot species of seal weighing hundreds of pounds who has traveled the eastern Mediterranean — waded into the water and swam away.

 A Mediterranean monk seal spotted on Israeli shores for the first time ever.

Researchers have discovered the oldest known bat skeletons

Bats are one of the most unique and fascinating creatures on the planet. Despite the immense interest in bats, there is still a lot we don't know about their history.

 Fruit Bat in daytime.

What makes a mammoth a woolly mammoth? – study

This ground-breaking study is the first to use a large sample size, enabling the researchers to look at adaptive evolution, not just genetic evolution.

 Woolly mammoth skull discovered by fishermen in the North Sea, at Celtic and Prehistoric Museum, Ireland.

Y chromosome may be disappearing in humans, new study finds

While most mammals have an X and Y chromosome-based system similar to that of humans, many species have seen a gradual decline in Y chromosomes.

 A cell is seen undergoing mitosis, replicating its chromosomes as it divides (Illustrative).