They may be an astronomer's worst enemy but clouds play a crucial role in making Earth habitable. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Twilight is the transition period between day and night, showcasing beautiful colors. Three types of twilight exist: civil, nautical, and astronomical, defined by the Sun's angle below the horizon.

For years, medical advice on sun exposure has remained largely consistent: limit direct sunlight, apply sunscreen liberally, and wear protective clothing to minimize the risk of skin cancer. But as ...

Different types of solar geoengineering are seeing a push for more research. ABC News is taking a look at solutions for issues related to climate change and the environment with the series, "The Power ...

The study hopes to influence building design in the future. Opening the window shades in the morning may not only help the growth of indoor plants or get skin a little dose of vitamin D -- it might ...

As spring arrives and the weather warms, exposure to sunlight could have an immense impact on overall health. Dr. Roger Seheult, a critical care physician, pulmonologist and associate clinical ...

Sun safety is always important. Exposure to ultraviolet A (UVA) and ultraviolet B (UVB) rays from the sun damages skin in ways that can lead to wrinkles, sunburns, and skin cancer. Both chemotherapy ...