All Stories by Esther Landhuis
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PhysicsPicture This: Christmas from space
Satellite images show that cities brighten during holidays. Charting such changes can point to factors affecting energy use and contributing to global warming.
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GeneticsWhy animals often ‘stand in’ for people
Rats, birds, fish — even flies and worms — can stand in for people in laboratory testing. This allows scientists to safely evaluate harmful chemicals as well as to identify and test potential new drugs. But such tests will never be a foolproof gauge of effects in people.
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Health & MedicineCan soft drinks speed aging?
A new study suggests a reason why daily sugary-soda drinkers are more prone to disease: Guzzling these drinks shortens the protective caps on chromosomes. If the caps get too short, cells die.
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Health & MedicineExercise builds brawn — and brains
One 20-minute session of leg exercises improved memory recall by about 10 percent.
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TechRepelling germs with ‘sharkskin’
A biotechnology company has found a way to repel superbugs without toxic chemicals. It mimics the texture of a shark’s skin.
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TechPlants ‘listen’ for danger
Scientists used lasers to show that plants can “hear” insect pests. Those leafy plants then mount a chemical attack in response to the bug’s chewing sounds — but not toward harmless noises such as a gentle breeze or a bug’s mating call.
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MicrobesThe war on superbugs
Doctors and scientists are exploring ways to stem the growing global crisis of antibacterial resistance.
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MicrobesExplainer: What you can do to fight antibiotic resistance
Doctors and scientists are not the only people who can help preserve the effectiveness of life-saving antibiotics. Even patients have a role to play, as these tips show.
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MicrobesSuperbugs: A silent health emergency
Have antibiotics become too popular? Overusing these medicines fuels resistant germs that pose a global health threat.
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MicrobesExplainer: Where antibiotics came from
A mold proved the source of the first known antibiotic: penicillin. But chemical dyes would lead to the first antibiotics used in treating people.