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1,659 articles from PhysOrg

Image: Hubble spots squabbling galactic siblings

A dramatic triplet of galaxies takes center stage in this image from the NASA/ESA Hubble Space Telescope, which captures a three-way gravitational tug-of-war between interacting galaxies. This system—known as Arp 195—is featured in the Atlas of Peculiar Galaxies, a list which showcases some of the weirder and more wonderful galaxies in the universe.

UN warns hunger is expected to rise in 23 global hotspots

Hunger is expected to rise in 23 global hotspots in the next three months with the highest alerts for "catastrophic" situations in Ethiopia's embattled Tigray region, southern Madagascar, Yemen, South Sudan and northern Nigeria, two U.N. agencies warned Friday.


FRIDAY 30. JULY 2021


In the absence of genetic variation, asexual invasive species find new methods of adapting to their environment

Without the benefits of evolutionary genetic variation that accompany meiotic reproduction, how does an asexual invasive species adapt over time to a new environment to survive? In all-female weevil species that produce only female offspring from unfertilized eggs, the insects' survival techniques have led to the surprising discovery that these creatures can pass down gene regulation changes to...

Bird brains left other dinosaurs behind

Today, being "birdbrained" means forgetting where you left your keys or wallet. But 66 million years ago, it may have meant the difference between life and death—and may help explain why birds are the only dinosaurs left on Earth.

'Greening' biomaterials and scaffolds used in regenerative medicine

Green manufacturing is becoming an increasingly critical process across industries, propelled by a growing awareness of the negative environmental and health impacts associated with traditional practices. In the biomaterials industry, electrospinning is a universal fabrication method used around the world to produce nano- to microscale fibrous meshes that closely resemble native tissue...

Blood-sucking flies may be following chemicals produced by skin bacteria to locate bats to feed on

We humans aren't the only animals that have to worry about bug bites. There are thousands of insect species that have evolved to specialize in feeding on different mammals and birds, but scientists are still learning how these bugs differentiate between species to track down their preferred prey. It turns out, the attraction might not even be skin-deep: a new study in Molecular Ecology found...

A single cell type map of human tissues

In a study published in the US journal Science Advances, a single cell type map of human tissues is presented. An open access atlas has been launched with more than 250,000 interactive plots to allow researchers to explore the expression in individual single cell types for all protein-coding genes in these tissues.

Watching light break down a model photocatalyst in near real time

Chemists create catalysts for use in industry and other applications. One of the methods to create these catalysts is by using light to break down organometallic compounds—substances that include both metals and carbon. These types of compounds are called photocatalysts. Scientists call the process of breaking down molecules with light, photodissociation. Researchers often study the...

Chemists discover a key to greener food production

Arguably the most important (if least well known) industrial advancement of the 20th century, the Haber-Bosch ammonia synthesis process essentially conquered food scarcity by creating the means to mass produce fertilizer—fertilizer then used to fortify food harvests around the world.

Electron microscopy in the age of automation

"Many of the greatest challenges of our time, from clean energy to environmental justice, require new approaches to the craft of scientific experimentation. This is exceedingly apparent in the field of electron microscopy. As researchers utilize this powerful window to peer into the atomic machinery behind today's technologies, they are increasingly inundated with data and constrained by...