A comparison of hexagonal boron nitride (hBN) layers grown by chemical vapor deposition on C -plane (0001) versus A -plane (112̅0) sapphire (α-Al 2 O 3) substrate is reported. The high deposition ...

Mathematicians have long been fascinated by packing problems like these. They are simple to state yet can be monstrously difficult to solve. The most famous packing problem concerns spheres. In ...

This, laid out by size in the pyramid, gave Americans a basic, if flawed, understanding of the ratio of meat to vegetables to grains they should be consuming. In 2005, the pyramid got a makeover.

How long vision problems last after a concussion will depend on the severity of your head injury, your age and overall health, and the area of your brain or visual system that has been injured.

Eye changes over time make vision problems more likely in older adults. According to a 2023 study, more than 1 in 4 people ages 71 years and older had visual impairment in 2021.

A Potato Primer Before diving into potential problems, let’s recap the basics of potato growing: Choosing Potato Varieties Potatoes come in various types, each suited to different culinary uses and ...

Jacob Roach / Digital Trends Black screen One of the most common GPU problems is that it simply doesn’t appear to work at all. If you turned on your PC and found that it just doesn’t display ...

The Great Pyramid The Great Pyramid of Giza was built for the pharaoh Khufu. Edwardwexler, CC BY-SA 4.0 , via Wikimedia Commons Giza, Egypt Circa 2550 B.C. to A.D. 1311; 1548-1569; 1573-1625 ...

Medical conditions can cause a person's tongue to change its appearance. Learn more about different tongue problems and how to treat them here.

The 1,083-foot Ryugyong Hotel in North Korea’s capital, Pyongyang, was supposed to be the world’s tallest hotel. But after 32 years, it’s still not open.

Acupuncture may benefit certain sinus issues, from headaches to congestion. Learn how it works and the possible benefits.