Uncategorized
- Chemistry
Touching receipts can lead to lengthy pollutant exposures
The chemical BPA, which coats some cash-register receipts, may linger in the body for far longer than if someone had ingested it.
- Chemistry
Explainer: Store receipts and BPA
The chemical BPA may become trapped in the skin, causing it to linger in the body for a week or more after touching receipt paper.
- Health & Medicine
For teens, a good mood depends on good sleep
Teens need eight to 10 hours of sleep at night to feel good and function well the next day, a new data show.
- Climate
Thawing mosses tell a climate change tale
Plants long entombed beneath Canadian ice are now emerging. They’re telling a story of warming unprecedented in the history of human civilization.
- Health & Medicine
Student invents 3-in-1 hygiene powder
A teen who volunteers at a homeless center has developed a powdery product that can serve as dry shampoo, body powder and toothpaste.
- Animals
How these poison frogs avoid poisoning themselves
Genetic changes protect poison dart frogs from a toxin, but those changes also cause ripple effects.
- Earth
Scientists Say: Ionosphere
The ionosphere is a region of the Earth’s upper atmosphere. The molecules there absorb ultraviolet light and reflect radio waves.
- Computing
Seeing the world through a robot’s eyes
Engineers in California have developed a new kind of camera that aims to give drones, self-driving cars and other robots better vision.
- Earth
Cool Jobs: Unearthing the secrets of soil
In ordinary soil, scientists can find clues to past civilizations, evidence to catch criminals and bacteria that might help fight global warming.
- Earth
Explainer: What makes dirt different from soil
Although most people use the terms dirt and soil interchangeably, scientists argue that they shouldn’t. Soil has provenance — meaning history. Dirt doesn’t.
- Physics
Teen identifies way to detect failing underground pipes
A teen researcher uses acoustics — here, pipe vibrations — to test whether buried water pipes are about to fail, and leak.
- Planets
Space toilet may teach scientists how to scout for life on distant icy moons
Lessons learned from flushing space toilets may help plan life-hunting missions on distant icy moons.
