Category: Health / Science

Pink noise for sleep

Q: I’ve heard that “pink noise” is more effective than white noise for sleep. Is that true? A: They both may help, but it’s not clear whether one type is more effective than the...

How a wound heals itself

Our skin is the largest organ in our bodies, with a surface area of about 2 squaremeter in adults. When we are cut or wounded, our skin begins to repair itself through a complex,...

Arthritis and exercise

If you have osteoarthritis, it need not limit your mobility—at least not if you exercise and keep moving. Half of the adults with OA report that they don’t participate in any physical activity. Thus,...

Seeing the invisible

This is what the world would look like if you could see invisible air currents, temperature gradients, and differences in pressure or composition of the air. Schlieren imaging is a method to visualize density...

Coconut oil has never been healthy

The American Heart Association recently released a report advising against the use of coconut oil. The Dietary Fats and Cardiovascular Disease advisory reviewed existing data on saturated fat, showing coconut oil increased LDL (“bad”) cholesterol in seven...

Antioxidants and free radicals

Antioxidants are part of the complex world of biochemistry. In cells, oxygen is constantly involved in chemical reactions in which electrons are shifted around. To generate energy, our cells remove electrons from sugars, fatty...

The very far future of the Universe

Future of humanity Years from now Event 10,000 Most probable estimated lifespan of technological civilization, according to Frank Drake‘s original formulation of the Drake equation. 10,000 If globalization trends lead to panmixia, human genetic...

History’s deadliest colors

When radium was first discovered, its luminous green color inspired people to add it into beauty products and jewelry. It wasn’t until much later that we realized that radium’s harmful effects outweighed its visual...