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Changing toothpastes? Change your toothbrush

Changing toothpastes? Change your toothbrush

Author: Alison Pearce Stevens / Source: Science News for Students The bristles of your toothbrush can absorb triclosan from toothpaste, a new study shows. Later, that chemical can come out again and expose your mouth. Some popular toothpastes contain an...

50 years ago, IUDs were deemed safe and effective

50 years ago, IUDs were deemed safe and effective

Author: Bethany Brookshire / Source: Science News SHAPE SHIFTERS Current intrauterine devices, or IUDs, are T-shaped. But previous designs of the contraceptives included curlicues, s-shapes and an ill-fated spiked shield. IUDs: approval of a renaissance In...

A robotic arm made of DNA moves at dizzying speed

A robotic arm made of DNA moves at dizzying speed

Author: Maria Temming / Source: Science News RAPID ROTATION A robot made entirely of DNA can rotate its arm (purple) 360 degrees or lock it down in certain positions thanks to special latches (yellow) on the bot’s platform. A new robotic arm made of...

Ultrathin 2-D metals get their own periodic table

Ultrathin 2-D metals get their own periodic table

Author: Maria Temming / Source: Science News ULTRATHIN FILMS Computer simulations reveal the properties of a little-studied group of synthetic materials: 2-D arrays of metal atoms arranged in honeycombs (illustrated), triangles or squares. A new version of...

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