COVER STORIES
Tag Archives: Science Magazines
Cover Preview: Science Magazine – April 22, 2022
Cover Preview: Nature Magazine – April 21, 2022
Life speed
Cells acquire mutations throughout life, a process that is known to give rise to cancer and has been proposed to contribute to ageing. There is little knowledge, however, about the rate at which mutations accumulate in species other than humans, and whether this rate is influenced by biological traits such as lifespan or body size. In this week’s issue, Alex Cagan, Adrian Baez-Ortega and colleagues address these questions. The researchers studied the speed at which mutations accumulate during life in 16 mammalian species and found that the number of mutations increases by a roughly constant amount each year. They also observed that the molecular processes causing mutations are broadly similar across species. Crucially, the team identified a strong anticorrelation between lifespan and mutation rate: longer-lived species accrue mutations at a slower pace than shorter-lived ones, such that different species have roughly the same number of mutations by the end of their respective lifespans.
Preview: New Scientist Magazine – April 16, 2022
Cover Previews: Nature Magazine – April 14, 2022
- Editorial | 12 April 2022The war in Ukraine is exposing gaps in the world’s food-systems researchRussia’s invasion is the latest threat to the stability of world food supplies. Researchers must act now to halt the cycle of repeated food crises.
- Editorial | 13 April 2022Global science must stand up for Iran’s imprisoned scholarsIranian researchers are at risk as never before. Governments are urging quiet diplomacy. But a new book shows why public campaigns matter.
- World View | 12 April 2022University culture wars over race theory recall 1920s fight to teach evolutionArguments for quality work better than quibbles over facts.
- Adam Laats
- Research Highlight | 04 April 2022The miniature mice locked in an evolutionary battle of the sexesThe African pygmy mouse, which weighs only 3–12 grams, has a complicated sex-determination system that pits males against females.
- Research Highlight | 04 April 2022Your morning coffee is served up by the birds and the beesExcluding the winged creatures from the branches of coffee plants meant fewer flowers and smaller fruit.
- Research Highlight | 06 April 2022Keeping it cool: a laser delicately carves up a crystal without heatingLight-sensitive dye molecules make a crystalline material sliceable.
Preview: New Scientist Magazine – April 9, 2022
Cover Preview: Nature Magazine – April 7, 2022
Preview: New Scientist Magazine – April 2, 2022
Preview: New Scientist Magazine – March 26, 2022
Cover Previews: Nature Magazine – March 24, 2022
Volume 603 Issue 7902, 24 March 2022
Star dater’s guide to the Galaxy
The cover image shows a view of the Milky Way captured at Nambung National Park in Western Australia. To understand how the Galaxy formed requires precision age dating of the stars that it contains. In this week’s issue, Maosheng Xiang and Hans-Walter Rix of the Max Planck Institute for Astronomy in Heidelberg, Germany, present an analysis of the birth dates for nearly 250,000 stars in their subgiant evolutionary phase, when they can serve as precise stellar clocks. The researchers found that the individual ages of the stars ranged from about 1.5 billion to more than 13 billion years old. Tripling the age-dating precision for such a large stellar sample allowed the researchers to infer the sequence of events that initiated our Galaxy’s formation. Using this information, Xiang and Rix were able to determine that the oldest part of our Galaxy’s disk had already begun to form about 13 billion years ago, just 800 million years after the Big Bang, and that the formation of the inner Galactic halo was completed some 2 billion years later.
Boomers Daily 