HS-LS4-4
Construct an explanation based on evidence for how natural selection leads to adaptation of populations.
- Health & Medicine
Some young adults will volunteer to get COVID-19 for science
Researchers will soon give some healthy people the new coronavirus. Their young volunteers have agreed to get sick to speed coronavirus research.
- Chemistry
Let’s learn about acids and bases
Acids give away particles with positive charge. Bases accept positively charged particles. They are both critical for chemical reactions.
- Archaeology
Harsh Ice Age winters may have helped turn wolves into dogs
In the Ice Age, Arctic hunters may have turned to some game for their fatty bones. Much of those animals’ meat might have been left to domesticate dogs.
- 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.
- Plants
Here’s how giant pumpkins get so big
Cinderella took a ride in a pumpkin coach. Though real pumpkins do get big enough, here’s why their ride would be uncomfortable at best.
- Life
Let’s learn about alligators and crocodiles
Alligators and crocodiles seem similar — but they live in different places and look different, too.
- Animals
A single chemical may draw lonely locusts into a hungry swarm
Swarms of locusts can destroy crops. Scientists have discovered a chemical that might make locusts come together in huge hungry swarms.
- Animals
Analyze This: Hurricanes may help lizards evolve better grips
Lizards have larger toepads in areas that tend to have higher hurricane activity. This suggests high winds select for those that can hang tight.
- Earth
On an Alaskan glacier, little green moss balls roll in herds
Oval balls of moss, nicknamed ‘glacier mice,’ roll across some glaciers. A new study explores the mysteries behind their herd-like motion.
- Animals
What you need to know about ‘murder hornets’
Two new specimens of the world’s largest hornet have just turned up in the United States. Here’s what to make of them and other alien-hornet invaders.
- Fossils
Saber-toothed anchovy relatives were once fearsome hunters
Today’s plankton-eating anchovies sport tiny teeth. But their ancient kin were armed with spiky lower teeth and a giant upper sabertooth.
- Health & Medicine
How to find the next pandemic virus before it finds us
Wild animals carry viruses that can sicken people. Monitoring those viral hosts that pose the greatest risk might help prevent a new pandemic.
