Alison Pearce Stevens' Articles
- We are the dominant force of change on Earth. Some experts propose naming our current time period the ‘Anthropocene’ to reflect our impact.
- Species are dying off at such a rapid rate — faster than at any other time in human existence — that many resources on which we depend may disappear.
- Teens often show poor judgment in decision-making. Scientists have long blamed this on the fact that their brains are still developing. A new study offers another explanation: distractions form rewarding behaviors — ones that persist even after the reward itself has disappeared.
- Rocks and boulders periodically move across the Racetrack Playa in Death Valley, leaving tell-tale tracks in their wake. Using advanced technology, scientists have finally solved the mystery of how this happens.
- This man uses a robotic arm to move a cursor across a computer screen. The screen blocks his view of his hand and arm. This focuses his attention on any errors he makes as he tries to move a cursor to a target location.
- Brain cells actually change shape as we learn. It’s one way we cement new knowledge. And much of the action happens as we sleep.
- Eating red meat can increase the risk of certain types of cancer. But scientists have discovered that eating potatoes and other foods containing 'resistant' starch can help limit those risks.
- A number of diseases threaten the world’s most popular fruit. Scientists are working to fight these blights. But if they don’t succeed, the sweet banana that’s a breakfast staple could disappear.
- Scientists find that boys’ and girls’ versions of lacrosse lead to similar injuries. Because girls frequently get concussions, the study argues that like the boys, girls too should wear helmets.
- Certain types of fiber suppress appetite, at least in mice. Found in fruits, vegetables, oats and barley, this fiber breaks down in the gut to release acetate. That travels to the brain, where the chemical prompts the release of hunger-fighting hormones.