mammals

Brown woodrat facing left, chewing on a daisy.

It’s who you are that matters most

A first-of-its-kind study found that evolutionary history has the strongest influence in both wild and captive woodrats’ microbiomes.


A desert landscape with striped layers of sediment colors, from auburn to shades of brown.

Tracking fossils to follow Utah’s past climate

A paleontologist and her team documented over 600 new fossil finds from the Age of Mammals, a record in the multi-decade Uinta Basin Project.


Patterns of income and urbanization impact mammal biodiversity in the concrete jungle

The 20-city study correlates mammal biodiversity with the degree of urbanization.


U contributes to first-ever nationwide mammal survey

A new 50-state survey shows Utah in the top 10 nationally for raccoons, bobcats and red foxes.


The mouse is light brown fur, a long tail and cute round ears holds a bunch of leaves in its mouth while scurrying across dead leaves on the ground.

Rediscovery of the ‘extinct’ Pinatubo volcano mouse

In 1991, a volcano in the Philippines had the second-most powerful volcanic eruption of the 20th century. Its effects were devastating—but a mouse feared to have gone extinct survived.


Two African crested rats stand face to face, nuzzling each other. The rodents are rabbit-sized and resembles a gray puffball crossed with a skunk. Their fur is various shades or brown and gray, with dark stripts that line its flanks from leg to its face.

The secret social lives of giant poisonous rats

The African crested rat’s fur is packed with a poison so lethal just a few miligrams can kill a human. Biologists confirmed where it gets its poison, and uncovered an unexpected social life.


Columns and rows of microscope slides, yellowed with age, containing male and female pairs of lice with descriptions of species, genes, location found, host and more info on their labels.

Discover parasite biodiversity from home

Millions of specimens are sitting in museums all over the world, but a lack of digital records make them hard to find and study. Help biologists discover parasite biodiversity.


Ecosystems of early human evolution

To understand the environmental pressures that shaped human evolution, scientists must first piece together the details of the ancient plant and animal communities that our fossil ancestors lived in over the past 7 million years.