Science Alert
Catch up on the latest science news, from space and technology to life and environmental research- all the discoveries shaping our world today.
Updated: 14 min 16 sec ago
How ancient Peruvians responded to climate disasters
Researchers examined over 1,500 ancient Peruvian skeletons to understand societal responses to climate disasters. Findings reveal that violence was rare even during El Niño flooding events that severely impacted food availability. Interestingly, mass human sacrifices were observed without corresponding everyday violence among the population. This suggests that ancient societies may have adapted creatively to ecological crises. Overall, the study highlights the choices societies make in response to environmental challenges.
Volunteer divers take on invasive corals near Rio de Janeiro
Bright orange sun corals, native to the Indo-Pacific, have invaded Brazilian waters for decades and threaten native coral species. The invasive species compete for space and damage surrounding coral colonies, posing risks to marine ecosystems. A national plan was launched in Brazil in 2018 to control and monitor these invaders. Volunteer divers, led by marine biologist Adriana Gomes, are removing sun corals from Cagarras Islands.
Doctors are using bacteria-killing viruses against superbugs that drugs cannot beat
Amidst the rising concern over antibiotic resistance, doctors are turning to phage therapy, a novel approach that employs viruses to target and eliminate dangerous bacteria. A recent Belgian study found that over 77% of patients showed significant clinical improvement. To enhance the application of personalized bacteriophage treatments, new international guidelines have been introduced, though researchers underline the importance of further studies to comprehend the therapy's potential fully.
Peat from ancient forests off Mozambique dates back up to about 5,000 years
Submerged ancient peat forests off Mozambique's coast have transformed into vibrant marine ecosystems, offering vital habitats for diverse marine life. As rising sea levels allowed these forests to sink, they have now integrated with coral reefs, enhancing local biodiversity. The carbon-rich legacy of these underwater realms also holds significant implications for climate strategies, highlighting the necessity of including peat reefs in conservation initiatives.
South Carolina permanently protected more than 62,000 acres of working forest
South Carolina has successfully protected over 62,000 acres of forestland with the Pee Dee Basin Initiative. This initiative represents a significant collaboration among various government and private organizations, totaling an investment of $70 million. The protected areas will support sustainable timber production while preventing incompatible development that undermines ecological integrity. In addition, this initiative will enhance local wildlife habitats and strengthen natural flood defenses for surrounding communities.
Baby pufferfish inherit a nearly non-toxic chemical from their mothers
In a fascinating discovery, researchers have found that mother pufferfish provide their larvae with a nearly non-toxic chemical that effectively helps them escape predators. This chemical deters potential threats by making them unpalatable, thus improving the young fish's chances of survival. Additionally, this same chemical intriguingly attracts other pufferfish, revealing a unique dual role that aids in their survival strategies during vulnerable stages.
Stanford scientists have built a fingernail-sized chip that turns jumbled light into clean beams
Stanford University researchers have developed a groundbreaking chip that effectively segregates mixed light into its individual components. This novel technology facilitates the analysis of coherence modes of light that were once challenging to identify. Utilizing advanced photonic techniques, the chip can enhance applications in fields like imaging and astronomy, potentially transforming our understanding of microscopic particles and faraway celestial phenomena.
2,800-year-old Siberian tomb reveals 1,000 cannabis seeds and evidence of ritual intoxication
A groundbreaking archaeological find at Tunnug 1 in southern Siberia unveiled cannabis seeds within a prince's tomb, dating back 2,800 years. This tomb is tied to intricate funerary rites, including horse sacrifices. Notably, preserved human hair revealed traces of cannabis, hinting at its psychoactive use, which underscores cannabis's significant role in ancient burial customs. Researchers plan to conduct further DNA analysis to deepen the understanding of its historical relevance.
Birds flap their wings while landing even though it costs energy, new model explains why
Research shows that birds flap their wings while landing to enhance control and deceleration. The energy expended during flapping has tangible benefits for a safe landing. Mathematical modeling indicates that a zero-speed landing without flapping is impractical for most birds. Birds of prey may also swoop to manage touchdown speed and avoid stalling before landing.
Women do not rate men with lower-than-average voices as more attractive when they can see them, finds study
According to recent findings from Durham University, deeper voices in men don't necessarily increase their appeal to women. The study highlighted that while a lower vocal pitch may convey strength and dominance, it does not enhance attractiveness ratings. Involving 17 men, the researchers carefully altered their voices to observe reactions. The results indicate that women's perceptions of attraction are more influenced by visual aspects than by vocal qualities.
Space won't wait for those who fall behind
Where you stand changes what you see
Researchers surveyed ancient Arabian desert, finding evidence of lakes but no early human tools
Recent studies indicate that early inhabitants of the Arabian Peninsula placed significant importance on freshwater sources and specific types of stones. Researchers extensively examined the vast Rub' al Khali sand sea for archaeological traces. While they discovered remnants of ancient lakes, the absence of stone tools pointed to limited human settlement.
Tests on 8 frozen Inca mummies sacrificed show they had chewed coca leaves and had drunk alcohol
A remarkable archaeological find has revealed eight frozen mummies of children from the Inca Empire, believed to have been sacrificed. Analysis of their hair and nails showed they've ingested coca and alcohol, hinting at a diversity of ritual practices based on local customs. Notably, one mummy, Juanita, contained harmine traces, suggesting specialized ritualistic preparations. This research unveils a rich tapestry of ancient cultural traditions and ceremonies.
In the 1830s, Americans bought tomato ketchup as medicine after a physician claimed tomatoes could treat indigestion and diarrhoea; pills made from tomato extract were sold across the country before the craze collapsed.
In the 1830s, Dr John Cook Bennett suggested that tomatoes had medicinal properties for treating digestive issues. This led to the creation of tomato extract pills sold as medicine by various entrepreneurs. The competition between manufacturers Archibald Miles and Dr Guy R. Phelps became known as the Tomato Pill War. Their public dispute was widely reported in newspapers and attracted significant attention.
Ancient Maya cities used red pigment in temples; study finds it left mercury in lakes for centuries
Ancient Maya civilization used a red pigment made of mercury-rich cinnabar for decoration and rituals. This practice led to significant mercury contamination of nearby lakes and ecosystems. Research indicates that rising mercury levels impacted aquatic organisms and may have affected human health. Previous studies have also shown similar contamination at various Maya sites, raising concerns about widespread environmental impact.
