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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.

mammalian evolution
Artist’s rendering of an early mammal called a mammaliamorph
Warm-Bloodedness in Mammals May Have Arisen in Late Triassic
Andy Carstens | Jul 21, 2022 | 2 min read
Researchers mapped ear canal shape to body temperature to predict when ancestors of mammals first became endothermic.
early giraffe relative at the bottom and modern giraffes at top
“Necks for Sex” May Explain Giraffes’ Distinctive Anatomy 
Andy Carstens | Jun 3, 2022 | 2 min read
An analysis of skull and vertebrae fossils suggests that an early relative of giraffes butted heads to compete for mates, which may reveal why modern giraffes are so throaty.
Photo of a North American caribou (Rangifer tarandus) in Jasper National Park in Canada
Dozens of Genes Tied to Caribou’s Seasonal Migration
Maddie Bender | May 2, 2022 | 2 min read
Researchers tracked the movements of endangered caribou and sequenced a portion of their genomes to determine which genes may influence migratory behavior.
Fossils of African Fauna
African, Arabian Mammals Didn’t Escape Grande Coupure Extinction
Chloe Tenn | Nov 8, 2021 | 2 min read
More than two-thirds of mammals in Africa and the Arabian Peninsula went extinct during the Eocene-Oligocene transition some 30 million years ago, a study finds.
Image of the Day: Dog-Faced Bats
The Scientist Staff and The Scientist Staff | Jan 31, 2018 | 1 min read
The discovery of two new species within the Cynomops genus has expanded the total known number of dog-faced bat species to eight. 
Mammalian Jaws Evolved to Chew Sideways
Catherine Offord | Jun 1, 2017 | 4 min read
Parallel evolution in jaws and teeth helped early mammals diversify their diets.
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