922,029 articles

Polyethylene waste could be a thing of the past

An international team of experts undertaking fundamental research has developed a way of using polyethylene waste (PE) as a feedstock and converted it into valuable chemicals, via light-driven photocatalysis.

A ‘living skin’ is protecting the Great Wall of China from erosion

The Great Wall of China used to be much greater. What stands today is only a fraction of the expansive fortifications built on the country’s northern borders starting more than 2000 years ago and then eroded by time. But many sections of the remaining walls seem to be getting preservation help from an unlikely source: thin layers of bacteria, moss, lichen, and other organisms known as...

First-of-its-kind tyrannosaur fossil reveals what younglings ate

Fully grown tyrannosaurs were fearsome predators. With powerful jaws and piercing teeth, they could kill huge herbivores larger than themselves. But young tyrannosaurs ate different—and much smaller—prey, paleontologists report today in Science Advances . A new fossil with remains of a last supper confirms these carnivores switched their diet as they grew...

Prehistoric fast food: fossil reveals final meal of young tyrannosaur

Rare preserved stomach contents show young dinosaur feasted on drumsticks of speedy turkey-sized creatureA remarkable fossil preserving the last meal of a young tyrannosaur has been discovered in Canada, revealing the dinosaur had a taste for prehistoric fast food.While tyrannosaurs were some of the most fearsome dinosaurs to roam the planet, with adults boasting massive bodies, huge heads and...

Metamorphic evolution of the East Tethys tectonic domain and its tectonic implications

A synthesis study published in Science China Earth Sciences is led by Prof. Yong-Fei Zheng at University of Science and Technology of China. It focuses on the thermal and tectonic evolution of regional metamorphism at convergent continental margins based on a systematic outline of metamorphic temperature (T), pressure (P), and time (t) information on high-grade metamorphic rocks along the Central...

Modified caffeine molecules help medical research move forward

Before researchers can develop targeted drugs, they need to know exactly how a disease works. Biochemist Bert Beerkens created molecules that allow them to find out. He used caffeine as the basis for new molecules that enable research into certain receptor proteins on cells.

Veins of bacteria could form a self-healing system for concrete infrastructure

In hopes of producing concrete structures that can repair their cracks, researchers are putting a new twist on an old trick for improving the durability of concrete. Fiber reinforcement has been around since the first masons were mixing horsehair into their mud. But this research team is taking this method to the next level by turning reinforcing fibers into a living tissue system that rushes...

Immersive VR goggles for mice unlock new potential for brain science

New miniature virtual reality (VR) goggles provide more immersive experiences for mice living in laboratory settings. By more faithfully simulating natural environments, the researchers can more accurately and precisely study the neural circuitry that underlies behavior. Compared to current state-of-the-art systems, which simply surround mice with computer or projection screens, the new goggles...

Formaldehyde, a carcinogen, is also used by the body to regulate our genes

Formaldehyde's toxicity was presumed to derive from its ability to crosslink DNA, but that happens only at huge doses. Recent discoveries that formaldehyde is found in the body in small amounts led a team to investigate its natural role. They found that formaldehyde regulates epigenetic modification of DNA, interfering with an enzyme that carries methyl groups used to modify DNA. Too much...

Mothers need more 'exclusive breastfeeding' support

Exclusive breastfeeding for the first six months of life is proven to protect both mother and child health. According to the World Health Organization (WHO), between 2015 and 2021, 48% of mothers exclusively breastfed, meaning that their babies were not given any other food or liquids. However, this figure is based on data collected from surveys which report what a child was given in the previous...