Ecosystems
Can people protect as much space as nature needs?
To save biodiversity, nations are drafting a plan to protect 30 percent of Earth by 2030. Up for debate is how best to do that.
Word of the Week
Health & Medicine
Scientists Say: Body Mass Index
This is someone’s weight in kilograms divided by the square of their height in meters. But it’s not a measure of someone’s health.
Explainers
Animals
Explainer: Insects, arachnids and other arthropods
Arthropods are all around us, but identifying them can be hard. To start, look at the four main groups: chelicera, crustaceans, myriapods and insects.
Analyze This!
Environment
Analyze this: Microplastics are showing up in Mount Everest’s snow
Microplastics have made their way to the snow on Earth’s tallest peak. Most of the plastic likely comes from climbers’ equipment and clothes.
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Secrets to Better Learning
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Africa’s poisonous rats are surprisingly social
Scientists confirm that the African crested rat can safely cover itself in poison and also find that the rodents may live in pairs — or even family groups.
