Biology
This Bat Uses Its Extra Long Penis Like an Arm While Mating
Serotine bats are the first mammals known to mate without penetration, new research suggests
Metal Pollution May Be Making More Green Sea Turtles Female
In addition to warming temperatures, new research finds contaminants might contribute to the endangered reptiles' skewed sex ratios
Here's What Causes Fainting, According to New Research
Scientists have discovered a pathway between the heart and brain in mice that appears to be involved during loss of consciousness
Watch How Hummingbirds Fly Through Narrow Spaces
Slow-motion video revealed the birds take two different approaches: flying sideways or pinning their wings back and darting like a bullet
Cheetahs Become More Nocturnal in Extreme Heat, Study Finds
Hunting later at night may force the big cats to surrender their prey to larger carnivores, such as lions and leopards
How Kingfishers Dive Head-First Into Water Without Getting Concussions
Thanks to a new genetic analysis of 30 kingfisher species, researchers are one step closer to understanding the birds' dramatic hunting style
Rats Can Use Imagination to Navigate in Virtual Reality, Study Finds
Like humans, the rodents appear to be able to visualize walking through locations they've previously visited
Engineers Create 'Air Conditioning' for Salmon With Chilled Patches of River Water
Wild Atlantic salmon can struggle with heat as they swim upstream to spawn—but artificial "thermal refuges" may help them cool off
The Ecological Benefits of Rehoming a National Park's Booming Bison Population
In Theodore Roosevelt National Park, staffers are keeping the local ecosystem in balance by sending 300 bison to Native American tribes
Genetically Modified Silkworms Can Produce Spider Silk That's Stronger Than Kevlar
The sturdy, biodegradable fibers could one day be used for surgical sutures or armored vests
How Do Cats Purr? Scientists May Now Have an Answer
Domestic cats produce low-frequency vocalizations when purring, an unusual ability for their small size
Viruses Found in Animal Poop May One Day Treat Diabetic Foot Ulcers, Scientists Say
Known as bacteriophages, the specialized viruses could hijack and kill drug-resistant bacteria
Flamingos Spotted in Wisconsin for First Time on Record Amid String of Rare Appearances
Following Hurricane Idalia, the conspicuous pink birds have been sighted in at least 11 states where they don’t typically live
Brainless Jellyfish Are Capable of Learning, Study Suggests
Scientists provide evidence that tiny Caribbean box jellyfish—which lack a central nervous system—can learn to navigate through mangrove roots
San Diego Closes Popular Beach for Seven Years to Protect Sea Lions
Visitors have been getting too close to the marine mammals—taking selfies and even harassing them—as they rear their pups
Are Wild Animals Really Just Like Us?
A summer of news reports about orca, otter and bird “attacks” has the public wondering if trying to understand animal behavior in human terms is misguided
Human Cells Display a Mathematical Pattern That Repeats in Nature and Language
New research suggests adult humans have between 28 trillion and 36 trillion cells, which follow a commonly seen distribution of size and mass
Songbirds That Learn to Make New Sounds Are the Best Problem-Solvers
Birds—and humans—are vocal learners, meaning they can imitate new vocalizations and use them to communicate
How an Orca Skeleton Made Its Way From Florida to the Smithsonian
Washed up in a rare stranding event, the newly collected specimen will offer rich exploration for researchers
Scientists Grow Part-Human Kidneys in Pig Embryos for Nearly a Month
The new work is a "big step forward" in finding new ways to generate viable organs for human transplants, but it comes with some ethical considerations
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