Environment
Landscape Explorer shows how much the American West has changed
The online tool stitches together historical images into a map that’s helping land managers make decisions about preservation and restoration.
Featured Articles in this Issue
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Cover Story
Ancient Maya power brokers lived in neighborhoods, not just palaces
Lidar discoveries and recent excavations are forcing archaeologists to rethink ancient Maya political structures.
Reviews & Previews
Science Visualized
Planetary Science
JWST spotted a new speedy jet stream in Jupiter’s atmosphere
Seen in images from the James Webb Space Telescope, the high-altitude feature may help untangle the inner workings of the giant planet’s atmosphere.
Notebook
Math
An enduring Möbius strip mystery has finally been solved
Playing with paper and scissors helped one mathematician figure out just how short the twisted loops can be.
Features
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Here are 10 early-career scientists you should know about in 2023
Researchers on this year's SN 10: Scientists to Watch list are shaping our future and our understanding of ourselves.
More Stories from the December 2, 2023 issue
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Rock from the impact that formed the moon may linger in Earth’s mantle
When the young Earth and a Mars-sized body collided 4.5 billion years ago, it left behind dense mantle rock that survives to today, a study finds.
- Paleontology
Dinosaur feathers may have been more birdlike than previously thought
Feather proteins can change during fossilization, raising questions about what dinosaur feathers really can tell us about feather evolution.
- Planetary Science
Marsquakes and meteorite hits show Mars has a dense liquid metal core
Mars’ dense liquid iron core is wrapped in a layer of molten rock, which threw off previous measurements of the Red Planet’s heart.
- Plants
Salty sweat helps one desert plant stay hydrated
The Athel tamarisk excretes excess salt through its leaves. The buildup of salt crystals pulls water directly from the air, a study reports.
- Plants
On some Australian islands, sea level rise may be helping mangroves thrive
Rising seas usually spell trouble for mangroves. But the first survey of the Howick Islands in 50 years finds that mangroves there have expanded a lot.
- Life
See the wonders of two newfound deep-sea coral reefs off the Galápagos
Coral reefs around the world are in trouble. But these reefs in the Galápagos Island Marine Reserve have yet to be damaged by humans.
- Health & Medicine
The CDC is expanding its disease surveillance of international travelers
Passengers at four major U.S. airports will now be tested for over 30 pathogens through a mix of wastewater testing and voluntary nasal swabs.
- Life
Head lice hitched a ride on humans to the Americas at least twice
The genes of head lice record the story of their human hosts’ global voyages.
- Life
Human cancer cells might slurp up bacteria-killing viruses for energy
In the lab, human cancer cells show signs of cell growth after ingesting bacteria-killing viruses, a hint our cells might use bacteriophages as fuel.
- Animals
Here’s how high-speed diving kingfishers may avoid concussions
Understanding the genetic adaptations that protect the birds’ brains when they dive for food might one day offer clues to protecting human brains.
- Neuroscience
In a Jedi-like feat, rats can move a digital object using just their brain
In a new study, rats could imagine their way through a 3-D virtual world, hinting at how brains can think about places that they’re not physically in.
- Physics
Physicists get a first glimpse of the elusive isotope nitrogen-9
With seven protons and two neutrons, the lopsided atomic nucleus of nitrogen-9 pushes the limits of what can even be considered a nucleus.
- Animals
The mysterious deaths of dozens of Zimbabwe’s elephants has been solved
A bacterium never before identified in elephants or implicated in deadly internal hemorrhaging killed Zimbabwe elephants in 2020, genetic tests show.
- Paleontology
Newfound fossil species of lamprey were flesh eaters
In China, paleontologists have unearthed fossils of two surprisingly large lamprey species from the Jurassic Period.
