MS-LS1-7
Develop a model to describe how food is rearranged through chemical reactions forming new molecules that support growth and/or release energy as this matter moves through an organism.
- Chemistry
Explainer: Some supplements may not have what it takes
Dietary supplements made from plants may not contain all of the chemicals that usually make a particular plant healthy for humans.
- Brain
Sugar makes mice sleepy
Sugar may amp up sleep-promoting cells in the brain, a new study in mice finds.
- Health & Medicine
For better weight control, fiber up!
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.
- Chemistry
Urine may make Mars travel possible
On Earth, urine is a waste. En route to Mars, it could be a precious renewable commodity: the source of drinking water and energy.
- Health & Medicine
Some of chocolate’s health benefits may trace to ‘bugs’
Dark chocolate offers people a number of health benefits. A new study finds that the breakdown of chocolate by microbes in the human gut be behind some benefits.
- Health & Medicine
Low protein, longer life — for some
Eating less protein can lengthen life and improve health. That’s the message from new studies in mice and in people.
- Earth
Intel STS finalist brings earthworms to the big time
Earthworms and charcoal help plants resist infections, according to research by Anne Merrill, a finalist in the 2014 Intel Science Talent Search.
- Chemistry
Explainer: What are oxidants and antioxidants?
Certain chemicals, including many in foods, fight chemical reactions that could harm cells in the body and in wildlife.
- Health & Medicine
Building a food pyramid
Experts are trying to work out new rules on which foods to eat and which ones to avoid.
- Humans
A human migration fueled by dung?
When people crossed from Asia to the Americas thousands of years ago, burning dung may have kept them warm.
