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13 articles from ScienceDaily
Study reveals average age at conception for men versus women over past 250,000 years
- ScienceDaily
- 23/1/6 20:45
Using a new method based upon comparing DNA mutation rates between parents and offspring, evolutionary biologists have revealed the average age of mothers versus fathers over the past 250,000 years, including the discovery that the age gap is shrinking, with women's average age at conception increasing from 23.2 years to 26.4 years, on average, in the past 5,000 years.
New discovery of sunscreen-like chemicals in fossil plants reveals UV radiation played a part in mass extinction events
- ScienceDaily
- 23/1/6 20:45
New research has uncovered that pollen preserved in 250 million year old rocks contain compounds that function like sunscreen, these are produced by plants to protect them from harmful ultraviolet (UV-B) radiation. The findings suggests that a pulse of UV-B played an important part in the end Permian mass extinction event.
Research team detects additive manufacturing defects in real-time
- ScienceDaily
- 23/1/6 20:45
Researchers can now detect the formation of keyhole pores, one of the most challenging defects common in additive manufacturing, with incredible accuracy.
Study shows gardening may help reduce cancer risk, boost mental health
- ScienceDaily
- 23/1/6 20:45
A randomized, controlled trial of community gardening found that those who started gardening ate more fiber and got more physical activity -- two known ways to reduce risk of cancer and chronic diseases. They also saw their levels of stress and anxiety significantly decrease.
Indigenous territories and protected areas are key to forest conservation in the Brazilian Amazon, study shows
- ScienceDaily
- 23/1/6 20:44
A U.S.-Brazilian study using time series satellite images from 2000 to 2021 reveals the vital role of Indigenous territories and protected areas for forest conservation in the Brazilian Amazon, as well as calls attention to the negative impacts of weakened governmental conservation policies in recent years.
Marine plankton tell the long story of ocean health, and maybe human too
- ScienceDaily
- 23/1/6 20:44
Researchers suggest that rising levels of humanmade chemicals, accumulating in marine plankton, might be used to monitor the impact of human activity on ecosystem health and perhaps study links between ocean pollution and land-based rates of childhood and adult chronic illnesses.
Scientists get fungi to spill their secrets
- ScienceDaily
- 23/1/6 20:44
Using multiplex base-editing, an approach that simultaneously modifies multiple sites in fungal genomes, chemical and biomolecular engineers coax fungi into revealing their best-kept secrets, ramping up the pace of new drug discovery.
Lab lights way to simple chemical synthesis
- ScienceDaily
- 23/1/6 20:44
Scientists have developed a photochemical process to simplify the synthesis of drug and chemical precursors known as diamines.
Lithium-sulfur batteries are one step closer to powering the future
- ScienceDaily
- 23/1/6 20:44
A research team has built and tested a new interlayer to prevent dissolution of the sulfur cathode in lithium-sulfur batteries. This new interlayer increases Li-S cell capacity and maintains it over hundreds of cycles.
Riddle solved: Why was Roman concrete so durable?
- ScienceDaily
- 23/1/6 20:44
An unexpected ancient manufacturing strategy may hold the key to designing concrete that lasts for millennia.
Study details impact of prairie dog plague die-off on other species
- ScienceDaily
- 23/1/6 14:25
This study, conducted from 2015-19 in the Thunder Basin National Grassland, may be the first to specifically examine the multispecies impacts of a wide-scale plague outbreak, which reduced the area covered by prairie dog colonies from nearly 25,000 acres to only about 125 acres in the study area. The 2017 outbreak was followed by abnormally high precipitation in 2018, which caused vegetation to...
Fathoming the hidden heatwaves that threaten coral reefs
- ScienceDaily
- 23/1/6 14:25
The severity of marine heatwaves (MHWs) that are increasingly impacting ocean ecosystems, including vulnerable coral reefs, has primarily been assessed using remotely sensed sea-surface temperatures (SSTs), without information relevant to heating across ecosystem depths. Here, using a rare combination of SST, high-resolution in-situ temperatures, and sea level anomalies observed over 15 years near...
Scars mended using transplanted hair follicles
- ScienceDaily
- 23/1/6 14:25
Researchers have found that hair follicle transplants can promote scar rejuvenation by altering their architecture and genetic makeup.