HS-LS4-1
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.
- Animals
Scientists Say: Medullary bone
Medullary bone is a layer that forms inside bird and dinosaur bones. It’s a source of the calcium in eggshells.
- Archaeology
This prehistoric woman from Peru hunted big game
Women in the Americas speared large prey as early as 9,000 years ago, new archaeological evidence suggests.
- Genetics
Scientists Say: Evolution
Evolution is how species change over time. Individuals in the group vary, and some will pass on their genes. Over time, the whole species changes.
- Animals
Attack of the inner-cannibal mega-shark
The outsized megalodon was a fierce terror that chewed its way across the oceans. It learned to kill even before it was born.
- Health & Medicine
Some Neandertal genes may up the risk of severe COVID-19
Most of the affected people descend from communities in South Asia or live in Europe today.
- Archaeology
See what these animal mummies are keeping under wraps
A new method of 3-D scanning mummified animals reveals life and death details of a snake, a bird and a cat that lived in ancient Egypt.
- Chemistry
Stinky success: Scientists identify the chemistry of B.O.
They turned up the enzyme in bacteria behind that underarm stench. Understanding how it works could pave the way to new types of deodorant.
- Fossils
American crocs seem to descend from kin that crossed the Atlantic
A fossil hints that early crocodiles crossed over from Africa, millions of years ago, to colonize a new land.
- Humans
Let’s learn about early humans
Homo sapiens are the last member left of our genus. But many other species of early humans existed before us.
- Fossils
Early dinosaurs may have laid soft-shelled eggs
Scientists for the first time have turned up evidence of fossils from soft-shelled dinosaur eggs. This has scientists rethinking how dinosaur eggs evolved.
- Fossils
These crocodile ancestors lived a two-legged life
A set of 106-million year old footprints show a crocodile relative appears to have walked on two legs.
- Fossils
Tube-dwelling sea creatures may be oldest known parasites
A fossil bed of clam-like animals from a half-billion years ago is covered in tube-dwelling organisms. These suggest the tube dwellers were parasites, scientists now report.
