feed info

230,036 articles from PhysOrg

Fossil dental exams reveal how tusks first evolved

A wide variety of animals have tusks, from elephants and walruses to five-pound, guinea pig-looking critters called hyraxes. But one thing tusked animals have in common is that they're all mammals—there are no known fish, reptiles, or birds with tusks. In a new study in Proceedings of the Royal Society B, paleontologists traced the first tusks back to ancient mammal relatives that lived before...

How do plants act fast to fight off infections?

New work led by Carnegie's Kangmei Zhao and Sue Rhee reveals a new mechanism by which plants are able to rapidly activate defenses against bacterial infections. This understanding could inspire efforts to improve crop yields and combat global hunger.

A new 3D printing frontier: Self-powered wearable devices

When most people think of wearable devices, they think of smart watches, smart glasses, fitness trackers, even smart clothing. These devices, part of a fast-growing market, have two things in common: They all need an external power source, and they all require exacting manufacturing processes. Until now.


TUESDAY 26. OCTOBER 2021


Researchers develop broadband spintronic-metasurface terahertz emitters with tunable chirality

Terahertz radiation, between infrared and microwave radiation in the electromagnetic spectrum, possesses unique advantages for fundamental studies and practical applications. The ability to generate and manipulate broadband chiral terahertz waves is essential for applications in material imaging, terahertz sensing, and medical diagnosis. It can also open up new possibilities for nonlinear...

A new way to generate light through use of pre-existing defects in semiconductor materials

Researchers from the Low Energy Electronic Systems Interdisciplinary Research Group at Singapore-MIT Alliance for Research and Technology, MIT's research enterprise in Singapore, together with collaborators at the MIT, National University of Singapore and Nanyang Technological University have discovered a new method of generating long-wavelength (red, orange, and yellow) light through the use of...