New evidence in Belize shows the ancient Maya responded to population and environmental pressures by creating massive agricultural features in wetlands, potentially increasing atmospheric CO2 and methane through burn events and farming, according to geographical research.
Read moreTo understand the environmental pressures that shaped human evolution, scientists must reconstruct the ecosystems in which they lived. Because putting together the puzzle of millions-of-years-old ecosystems is a difficult task, many studies draw analogies with present-day African ecosystems, such as the Serengeti. A new study calls into question such approaches and suggests that the vast majority of human evolution occurred in ecosystems unlike any found today.
Read moreEngineers have developed silk materials that can wrinkle into highly detailed patterns — including words, textures and images as intricate as a QR code or a fingerprint. The patterns are stable, but can be erased by flooding the surface of the silk with vapor, allowing the surface to be printed again. The researchers demonstrate multiple examples of the silk wrinkle patterns, and envision a wide range of potential applications for optical electronic devices.
Read moreLimits to growth lie at the heart of how all living things function. The diversity of life is staggering. From microscopic algae to elephants, life has devised countless ways to thrive in every environment on the planet. But while biologists have tended to focus on the many varied forms that species have evolved, the age of 'big data' offers an unprecedented view of some surprisingly common features shared by all creatures, great and small.
Read moreEach year, thanks to inconclusive tests for thyroid cancer, thousands of people undergo unnecessary surgeries to remove part or all of their thyroids. A new test based on the unique chemical fingerprints of thyroid cancer might change that. It's faster and about two-thirds more accurate than the diagnostic tests doctors use today.
Read moreTransportation researchers looked into why the docked bike-share program Pronto failed while dockless bike sharing has been so successful.
Read moreA study of US labor data suggests AI is already taking 'thinking economy' jobs from humans, and this trend will grow in the future. This will push more people into 'feeling economy' jobs that require things like interpersonal relationship skills and emotional intelligence.
Read moreFood deserts are an increasingly recognized problem in the United States, but a new study indicates urban and home gardens — combined with nutrition education — could be a path toward correcting that disadvantage.
Read moreResearchers have successfully grown human, testosterone-producing cells in the lab, paving the way to someday treat low testosterone with personalized replacement cells.
Read moreScientists have revealed how the electrical patterns formed within an embryo initiate a cascade of molecular changes that culminate in the development of cartilage and bone. Prior studies have shown these electrical patterns appear like blueprints of the tissues and organs that eventually take shape as the embryo matures. The new study demonstrates that voltage gated calcium channels 'read' the electrical pattern, setting off the expression of genes that guide differentiation to mature cells.
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