News in Brief
Scarce oxygen and abundant sulfate prevented methane from accumulating enough to keep Earth warm hundreds of millions of years ago, reviving the faint young sun paradox.
A population of small cliffs on Mercury suggests that the planet might have been tectonically active in the last 50 million years.
A group of scientists will formally propose the human-defined Anthropocene as a new epoch in Earth’s geologic history within a few years, probably pegging the start date to nuclear tests.
Science News spotlights 10 rising scientists who will transform their research fields over the coming decades.
Soils may take in far less carbon by the end of the century than previously predicted, exacerbating climate change.
Unlike strength training, endurance workouts left no genetic trace months later, calling into question idea of a general muscle memory.
Compressing rocks from an ocean plateau at high temperatures and pressures re-creates the formation of Earth’s first continental crust.
A star that vanished in another galaxy might be the first confirmed case of a failed supernova — and the birth of a black hole.
Computational biologist Lawrence David chronicled changes in his gut microbes for a year.
Science News looks at where presidential candidates Hillary Clinton and Donald Trump stand on seven key science issues, from genetic engineering to space exploration.
About 99.999% of the light that creates a suntan comes from the sun; the rest comes from the Big Bang and galaxies throughout the universe.
Reviews & Previews
The Long, Long Life of Trees explores the scientific, historical and cultural significance of apple, birch, elm and 14 other kinds of trees.