News
- Chemistry
Long nails don’t work on touchscreens. An experimental polish could help
Proton movement in the nail polish probably activates the touchscreen, but the formula isn’t ready to hit shelves yet.
- Animals
Mosquitoes get the ‘I’m full’ signal from their butts, not their brains
Mosquitoes stop feeding because signals from rectal cells tell them they’re full, offering a target for preventing human bites.
- Archaeology
A new study questions when people first reached South America
Data suggest people lived at Chile’s Monte Verde site thousands of years later than thought, challenging key “pre-Clovis” evidence. Not all agree.
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