Life
We summarize the week's scientific breakthroughs every Thursday.
- Paleontology
Eggs evolved color and speckles only once — during the age of dinosaurs
Birds’ colorful eggs were inherited from their nonavian dinosaur ancestors.
- Neuroscience
Stimulating the spinal cord helps 3 more paralyzed people walk
There’s more evidence that with targeted spinal cord stimulation, paralyzed people can move voluntarily — and even walk.
- Animals
How roaches fight off wasps that turn their victims into zombies
Cockroaches kick attacking emerald jewel wasps to avoid being incapacitated and buried alive as living meat for the wasps’ young.
- Ecosystems
How researchers flinging salmon inadvertently spurred tree growth
Scientists studying salmon in Alaska flung dead fish into the forest. After 20 years, the nutrients from those carcasses sped up tree growth.
- Neuroscience
Young people’s memories improved when they stopped using marijuana
After just a week of not using pot, teens’ and young adults’ abilities to remember lists of words got better, a small study finds.
- Animals
If you want to believe your home’s bug free, don’t read this book
‘Never Home Alone’ reveals the hidden world living in human-made spaces.
- Archaeology
Ancient South Americans tasted chocolate 1,500 years before anyone else
Artifacts with traces of cacao push back the known date for when the plant was first domesticated by 1,500 years.
- Chemistry
Zapping substances with electrons can quickly map chemical structures
Speedy molecular identification originally developed for proteins might benefit crime lab researchers and drugmakers.
- Animals
While eating, these tiny worms release chemicals to lure their next meal
As they eat insects, one nematode species releases chemicals that attract more insect prey.
- Animals
Coral larvae survive being frozen and thawed for the first time
Cryopreservation might help save some coral reefs at risk from climate change and other dangers.
- Paleontology
The first vertebrates on Earth arose in shallow coastal waters
After appearing about 480 million years ago in coastal waters, the earliest vertebrates stayed in the shallows for another 100 million years.
- Life
To get a deeper tan, don’t sunbathe every day
Skin cells make protective melanin on a 48-hour cycle.
