All Stories
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BrainNature resets body’s clock
After a week in the wild, people went to bed — and got up — earlier.
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Health & MedicineExplainer: The teenage body clock
Around puberty, a change in the body clock of adolescents and teens makes it hard for them to fall asleep as early as they used to.
By Susan Gaidos -
TechSniffing for cancer
New surgical tool offers surgeons speedier diagnosis of tissues that are cancerous.
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BrainFull moon shortchanges sleep
Lab experiments show people’s sleep suffers for a day or so every month.
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Health & MedicineCool Jobs: Sports science
From soccer teams to the balance beam, scientists help athletes perform their best.
By Helen Fields -
PhysicsLiquid undergoes magnetic ‘splits’
The demonstration helps scientists begin how molecules in plants and animals naturally alter their shapes.
By Andrew Grant -
EarthFracking waste and quakes
Underground storage of liquid waste from these mining operations can make an area more vulnerable to tremors.
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Health & MedicineExplainer: What should I know about HIV and AIDS?
Here are some common myths and some less common facts.
By Bryn Nelson -
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FossilsTar pit bones yield climate clues
During the last ice age, more than 12,000 years ago, many unusual creatures wandered Southern California. Some got trapped in tar pits there. Now, their preserved remains are providing scientists with clues about summer weather during that bygone era.
By Sid Perkins