HS-LS4-1
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.
- Chemistry
Ancient recipes helped scientists resurrect a long-lost blue hue
Led by medieval texts, scientists hunted down a plant and used its fruit to make a blue watercolor with mysterious origins.
- Fossils
This dinosaur was no bigger than a hummingbird
The skull of one of these ancient birds — the tiniest yet known — was discovered encased in a chunk of amber originally found in Myanmar.
- Animals
What would it take to make a unicorn?
Onward’s dumpster-diving unicorns seem like an impossibility. But scientists have some ideas about how unicorns could become real.
- Animals
Small T. rex ‘cousins’ may actually have been growing teens
Dinosaurs once thought to be mini cousins of Tyrannosaurus rex may have been merely adolescent members of the famous species, a new study suggests.
- Animals
Piranhas and plant-eating kin replace half their teeth at once
Piranhas and pacus shed and replace half of their teeth at a time. New teeth lock together as they push up from the jaw.
- Animals
Blood vessels in their heads kept big dinos from overheating
Giant dinosaurs evolved several ways to cool their blood and avoid heatstroke.
- Earth
Explainer: Understanding geologic time
Geologic time is unimaginably long. Geologists puzzle it out using a calendar called the Geologic Time Scale.
- Animals
DNA tells tale of how cats conquered the world
Ancient DNA study suggests that domesticated cats spread across the ancient world in two waves.
- Archaeology
European fossils may belong to earliest known hominid
New fossils suggest that the earliest non-ape human ancestors may have evolved in Europe, not Africa.
- Fossils
Study claims to have found oldest human fossils
Humans, as a species, may be much older than previously thought. They also may have evolved further North and West of the suspected cradle of human evolution.
- Animals
How the house mouse found its home
Once people started settling down 15,000 years ago, a mouse species followed them indoors. The animals didn’t need people to be farming and storing food.
- Fossils
Fossils offer new candidate for earliest life
Rock unearthed in Canada appears to hold fossils from seafloor microbes that would have lived around 4 billion years ago, when Earth was very young.
