Humans
We summarize the week's scientific breakthroughs every Thursday.
- Genetics
DNA reveals ancient Siberians who set the stage for the first Americans
A previously unknown population of Ice Age people who traveled across Beringia was discovered in Russia.
- Genetics
Almost all healthy people harbor patches of mutated cells
Even healthy tissues can build up mutations, some of which have been tied to cancer.
- Health & Medicine
Limiting global warming to 1.5 degrees C could prevent thousands of deaths in the U.S.
A study projecting heat-related mortality in 15 U.S. cities illustrates urban risk from global warming.
- Anthropology
Hominids may have been cutting-edge tool makers 2.6 million years ago
Contested finds point to a sharp shift in toolmaking by early members of the Homo genus.
- Life
Gut bacteria may change the way many drugs work in the body
A new survey of interactions between microbes and medications suggests that gut bacteria play a crucial role in how the body processes drugs.
- Archaeology
Cave debris may be the oldest known example of people eating starch
Charred material found in South Africa puts energy-rich roots and tubers on Stone Age menus, long before farming began.
- Anthropology
Africa’s first herders spread pastoralism by mating with foragers
DNA unveils long-ago hookups between early pastoralists and native hunter-gatherers in Africa.
- Health & Medicine
A fungus weaponized with a spider toxin can kill malaria mosquitoes
In controlled field experiments in Burkina Faso, a genetically engineered fungus reduced numbers of insecticide-resistant mosquitoes that can carry malaria.
- Chemistry
Vaping the sweetener sucralose may produce toxic chemicals
Sucralose in e-liquids can break down, increasing toxic aldehydes in vapors and producing harmful organochlorines, including a potential carcinogen.
- Health & Medicine
Resurgence of measles is a tale as old as human history
Editor in Chief Nancy Shute discusses the recent global measles outbreak and the history of the spread of pathogens.
- Health & Medicine
One number can help explain why measles is so contagious
The basic reproduction number, or "R naught," of measles shows how contagious the disease is compared with other pathogens.
- Life
How bacteria nearly killed by antibiotics can recover — and gain resistance
A pump protein can keep bacteria alive long enough for the microbes to develop antibiotic resistance.
