Life
We summarize the week's scientific breakthroughs every Thursday.
- Genetics
Ancient boy’s DNA pushes back date of earliest humans
Genes from South African fossils suggest humans emerged close to 300,000 years ago.
- Animals
Bedbugs may be into dirty laundry
When humans aren’t around, bedbugs go for the next best thing: smelly human laundry.
- Paleontology
Saber-toothed kittens were born armed to pounce
Even as babies, saber-toothed cats had not only oversized canine teeth but also unusually powerful forelimbs.
- Paleontology
This giant marsupial was a seasonal migrant
The giant, extinct marsupial Diprotodon optatum migrated seasonally, the first marsupial shown to do so.
- Paleontology
This giant marsupial was a seasonal migrant
A new analysis suggests that Diprotodon optatum, a giant plant-eating marsupial that went extinct about 40,000 years ago, migrated long distances, much like today’s zebras and wildebeests.
- Animals
To test sleep, researchers don’t let sleeping jellyfish lie
Upside-down jellyfish are the first known animals without a brain to enter a sleeplike state.
- Health & Medicine
From day one, a frog’s developing brain is calling the shots
Frog brains help organize muscle and nerve patterns early in development.
- Environment
The way poison frogs keep from poisoning themselves is complicated
Gaining resistance to one of their own toxins forced some poison dart frogs to make other genetic tweaks, too.
- Neuroscience
Gene variant linked to Alzheimer’s disease is a triple threat
A genetic risk factor for Alzheimer’s disease works on multiple aspects of the disease, researchers report.
- Paleontology
Shhhh! Some plant-eating dinos snacked on crunchy critters
Scientists studying dinosaur poop found that some duck-billed dinos cheated on their vegetarian diets by snacking on crustaceans.
- Animals
This newfound hermit crab finds shelter in corals, not shells
A newly discovered hermit crab takes its cue from peanut worms and uses walking corals as a permanent shelter.
- Health & Medicine
By ganging up, HIV antibodies may defeat the virus
A duo or trio of powerful antibodies was effective at stopping an HIV-like infection in lab monkeys, two studies find.
