Life
We summarize the week's scientific breakthroughs every Thursday.
- Genetics
Ancient DNA unveils Siberian Neandertals’ small-scale social lives
Females often moved into their mate’s communities, which totaled about 20 individuals, researchers say.
- Genetics
Black Death immunity came at a cost to modern-day health
A genetic variant that boosts Crohn’s disease risk may have helped people survive the 14th century bubonic plague known as the Black Death.
- Animals
Honeybees order numbers from left to right, a study claims
In experiments, bees tend to go to smaller numbers on the left, larger ones on the right. But the idea of a mental number line in animals has critics.
- Animals
Some seabirds survive typhoons by flying into them
Streaked shearwaters off the coast of Japan soar for hours near the eye of passing cyclones as a strategy to weather the storm.
- Life
This ancient worm might be an important evolutionary missing link
A roughly 520-million-year-old fossil may be the common ancestor of a diverse collection of marine invertebrates.
- Paleontology
Dinosaur ‘mummies’ may not be rare flukes after all
Bite marks on a fossilized dinosaur upend the idea that exquisite skin preservation must result from a carcass's immediate smothering under sediment.
- Neuroscience
Clumps of human nerve cells thrived in rat brains
New results suggest that environment matters for the development of brain organoids, 3-D nerve cell clusters that grow and mimic the human brain.
- Life
A glimpse inside a gecko’s hand won the 2022 Nikon Small World photo contest
The annual competition highlights microscopic images that bring the smallest details from science and nature to life.
- Health & Medicine
Cooperative sperm outrun loners in the mating race
Sperm that swim in clusters travel more directly toward the uterus, while overcoming fluid currents in the reproductive tract.
- Neuroscience
Why traumatic brain injuries raise the risk of a second, worse hit
Recent hits to Miami Dolphins quarterback Tua Tagovailoa have reignited discussions of brain safety for professional football players. Brain experts weigh in.
- Animals
Tree-climbing carnivores called fishers are back in Washington’s forests
Thanks to a 14-year reintroduction effort, fishers, or “tree wolverines,” are once again climbing and hunting in Washington’s forests after fur trapping and habitat loss wiped them out.
- Life
A metal ion bath may make fibers stronger than spider silk
The work is the latest in a decades-long quest to create artificial fibers as strong, lightweight and biodegradable as spider silk.
