Back acne is frustrating, and it is also very common. The skin on your back is thicker and has larger pores than your face, which makes it prone to breakouts. The direct answer to what causes zits on your back is that they form when hair follicles become blocked with oil and dead skin cells. … Read more

The short answer is that a human eye can see forever — as long as the object is bright enough and nothing blocks the view. On a clear night, you can see the Andromeda Galaxy with your naked eyes. That light traveled about 2.5 million years to reach you. Distance is not the real limit. … Read more

If your lithops feels soft and squishy, the most likely cause is overwatering, which leads to root rot. A healthy lithops should feel firm and hard, like a smooth stone. When the inner leaves turn mushy or translucent, the plant is holding too much water and its roots are likely failing. Why Is My Lithops … Read more

A pregnancy test line that isn’t getting darker is a common source of anxiety. The short answer is that a test line’s darkness is tied to the amount of hCG hormone in your urine, and that level fluctuates for several normal reasons. A lighter line does not automatically mean a problem, but it also does … Read more

HPV is the most common sexually transmitted infection in the United States, and it can be found in semen. The presence of HPV in semen does affect male fertility in some cases, and it can be transmitted to a partner during intercourse. Research indicates that HPV can reduce sperm motility and damage sperm DNA, which … Read more

Fog is a collection of tiny water droplets suspended in the air, and for most healthy people, breathing it in is not harmful. However, fog can trap pollutants, allergens, and other particles close to the ground, which means the air you breathe during foggy conditions may contain more than just water. For people with asthma, … Read more

Eye colour is one of the first things we notice about a person, and it is also one of the most genetically complex traits we have. The most common eye colour worldwide is brown. It is estimated that over half of the global population has brown eyes, making it the dominant shade by a significant … Read more

Computed tomography, commonly called a CT scan, is a medical imaging technique that uses X-rays and computer processing to create detailed cross-sectional pictures of the body. Unlike a standard X-ray, which flattens the body into a single two-dimensional image, a CT scan takes many X-ray images from different angles and combines them to show slices … Read more

If you use CBD products and have a drug test coming up, the short answer is: most CBD will not show up on a drug test, but it can in certain situations. Standard drug tests look for THC, not CBD. However, some CBD products contain enough THC to trigger a positive result. The risk depends … Read more