MS-LS4-2
Apply scientific ideas to construct an explanation for the anatomical similarities and differences among modern organisms and between modern and fossil organisms to infer evolutionary relationships.
- Animals
Explainer: Black bear or brown bear?
If you see a bear, check size, shape and more to find out what type it is.
- Life
Scientists Say: Hominid
Scientists are still working out what counts as a hominid. Some say it’s just people and our extinct ancestors. Others say add more apes.
- Animals
Giant worms may have hidden beneath the ancient seafloor to ambush prey
Twenty-million-year-old tunnels unearthed in Taiwan may have been home to creatures similar to today’s monstrous bobbit worms.
- 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
Let’s learn about bones
Bones hold us up and help us fight gravity with every step. They also make blood cells, hormones and more.
- 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.
- Life
Let’s learn about alligators and crocodiles
Alligators and crocodiles seem similar — but they live in different places and look different, too.
- 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.
- Microbes
Some deep-seafloor microbes still alive after 100 million years!
Some starving microbes nap while awaiting their next meal. For some living miles below the ocean surface, that nap may exceed 100 million years.
