Physiology
- Life
How to trap sperm
Lab-made beads can trick and trap sperm, potentially preventing pregnancy or selecting sperm for fertility treatments.
- Paleontology
How to tell if a T. rex is expecting
A “pregnancy” test for tyrannosaurs relies on chemical analyses of medullary bone, a reproductive tissue found in female birds.
- Life
Removing worn-out cells makes mice live longer and prosper
Senescent cells promote aging, and removing them makes mice live longer, healthier lives.
- Life
Body’s bacteria don’t outnumber human cells so much after all
New calculations show human cells about equal bacteria in the body.
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- Animals
Pygmy slow loris hibernates in winter
The pygmy slow loris truly hibernates, making it the first primate found outside Madagascar to do so, a new study says.
- Health & Medicine
A good diet for you may be bad for me
Eating the same foods can produce very different reactions in people.
- Life
How electric eels put more zip in their zap
With feisty prey, an electric eel curls its tail to intensify shocks and exhaust prey.
- Life
For people, mealtime is all the time
People eat for most of their waking hours, which may affect sleep and weight.
- Animals
Loss of vision meant energy savings for cavefish
Novel measurement feeds idea that tight energy budgets favored vision loss in cavefish.
- Animals
Hummingbird tongues may work like micropumps
Hummingbird tongues work as elastic micropumps instead of simple thin tubes, researchers say in latest round of a scientific debate.
- Chemistry
Plants’ ‘don’t-eat-me’ chemicals no problem for earthworms
Newly discovered gut compounds called drilodefensins allow earthworms to pack in plant debris loaded with hazardous chemicals.
