Woman with buns and blue sweater chewing gum, smiling, and stretching pink gum out of her mouth. 
The Energetic Cost of Chewing May Have Shaped Hominin Evolution
The simple act of chewing gum can raise the body’s metabolic rate by as much as 15 percent, a study finds.
The Energetic Cost of Chewing May Have Shaped Hominin Evolution
The Energetic Cost of Chewing May Have Shaped Hominin Evolution

The simple act of chewing gum can raise the body’s metabolic rate by as much as 15 percent, a study finds.

The simple act of chewing gum can raise the body’s metabolic rate by as much as 15 percent, a study finds.

energy metabolism
An illustration of a mitochondrion, represented by a purple and orange bilayer, synthesizing reddish molecules of ATP.

Mitochondrial Protein Fuels Spread of Head and Neck Cancer 

Patience Asanga | Jul 8, 2022
Head and neck cancer cells lacking the peptide involved in energy production were less likely to metastasize in mice.
Close-up of wild sea otter (Enhydra lutris) eating shellfish while floating on it's back.
Sea Otters Demonstrate that There Is More to Muscle than Just Movement—It Can Also Bring the Heat
Traver Wright, Melinda Sheffield-Moore, and Randall Davis | Dec 13, 2021
Sea otters are born with a supercharged metabolism that helps them stay warm in chilly waters.
A bar of milk chocolate with the foil peeled back and a bite taken out
Q&A: Eating Milk Chocolate in the Morning Boosts Fat Metabolism
Amanda Heidt | Jun 30, 2021
A study of 19 postmenopausal women found that eating a bar of chocolate in the morning affected their bodies differently than eating it at night, but neither led to weight gain.
Image of the Day: Shrinking Dinosaurs
Emily Makowski | Jan 3, 2020
As dinosaurs got smaller, their metabolism increased, paving the way for bird evolution.
a runner on a road through the desert
Metabolism Hits a Ceiling in Athletic Endurance Feats
Shawna Williams | Jun 5, 2019
In long-distance, physically taxing events, the amount of energy athletes can expend appears to peak at about 2.5 times their metabolic resting rate—a maximum likely dictated by how many calories they can digest.
A Newly Identified Photoenzyme Helps Algae Pump Out Fuel
Katarina Zimmer | Feb 1, 2018
The finding could lead to a new way of producing “green” alternatives to fossil fuels.
Top 10 Innovations 2015
The Scientist Staff | Dec 1, 2015
The newest life-science products making waves in labs and clinics
A Weighty Anomaly
Jyoti Madhusoodanan | Nov 1, 2015
Why do some obese people actually experience health benefits?
Nourishing the Aging Brain
Morten Scheibye-Knudsen | Mar 1, 2015
Research reveals how the brain changes as we age and hints at ways to slow the decline.
Stubbornly Persistent
Mary Beth Aberlin | Feb 1, 2015
Microorganisms continually challenge our assumptions of what life can achieve.
The Energy of Life
Jeffrey Marlow and Jan Amend | Feb 1, 2015
Extremophiles should not be viewed through an anthropocentric lens; what’s extreme for us may be a perfectly comfortable environment for a microbe.
Contributors
Molly Sharlach and Jenny Rood | Feb 1, 2015
Meet some of the people featured in the February 2015 issue of The Scientist.
Cadherin Connection
Jyoti Madhusoodanan | Dec 1, 2014
A multitasking plasma membrane protein coordinates cell division and energy metabolism in healthy—and perhaps also cancerous—Drosophila cells.
Muscle to Mind
Jyoti Madhusoodanan | Sep 25, 2014
Exercise-induced muscle metabolites protect the brain from stress-induced depression in a mouse model. 
The Energizer
Megan Scudellari | May 1, 2014
György Hajnóczky uncovers the chemical and physical strategies by which mitochondria communicate and function within a cell.