On December 2, within 24 hours, a coronal hole, or dark spot ... their black appearance. Most importantly, they are only visible via ultraviolet light. The hole that formed on the Sun's surface ...

Areas of the body that receive the most sun exposure ... where they view the spots through a special device that emits black light. If a doctor or healthcare professional suspects a dark spot ...

With spring in full swing and the sun making a welcome appearance, gardeners are being cautioned that the warmer weather could bring about diseases like black spot, which poses a real threat to roses.

April's typical warm and rainy spells provide perfect conditions for black spot disease, a fungus that spreads through water. The disease manifests at the base of the plant as circular black marks ...

In black-spot poison ivy dermatitis, a black lacquerlike substance forms on the skin when poison ivy resin is exposed to air. Although the Toxicodendron group of plants is estimated to be the most ...