HS-LS2-2
Use mathematical representations to support and revise explanations based on evidence about factors affecting biodiversity and populations in ecosystems of different scales.
- Animals
This frog is the world’s smallest known vertebrate
Neither fleas nor toads, Brazilian flea toads are almost flea-sized. These mini frogs are small enough to fit on a pinkie fingernail.
- Health & Medicine
9 things to know about lead’s health risks — and how to curb them
Lead has been linked to lower IQ, behavior problems, mental-health disorders, strokes and more health impacts. There are ways to reduce your exposure.
- Microbes
Let’s learn about useful bacteria
Bacteria do many useful jobs almost everywhere on Earth, from the soil to the seafloor to our stomachs.
- Life
Bacterial fossils exhibit earliest hints of photosynthesis
Microscopic fossils from Australia suggest that some bacteria evolved structures for oxygen-producing photosynthesis by 1.78 billion years ago.
- Life
Scientists Say: Protist
Unified by a few key traits, these diverse organisms come in all shapes and sizes.
- Life
Has the Endangered Species Act saved species from extinction?
After 50 years, this landmark law has kept many species alive — but few wild populations have recovered enough to come off the “endangered” list.
- Tech
Meet robots on a mission to help birds
A new generation of bird-like robots is helping people better understand and protect the wild animals that inspired them.
- Earth
Analyze This: Tropical forests have gotten patchier
Although many of the world's forests have gotten less fragmented since 2000, tropical forests have gotten more chopped up, putting animals at risk.
- Health & Medicine
Doctors found a snake parasite in a woman’s brain — still alive
This worm typically infects pythons. Though this is its first known infection in humans, other types of worms also can infect the human brain.
- Animals
Let’s learn about vampire bats
Vampire bats rarely bite people, instead preferring to feed on animals like cows and horses.
- Oceans
Summer 2023 is when the ocean first turned ‘hot tub’ hot
Unfortunately, scientists worry that this atypical sea warming may actually be the beginning of an unwelcome new ‘normal.’
- Ecosystems
Scientists Say: Predator and Prey
Ecological relationships between predators and their prey drive the evolution of plants, animals and microbes.
