While fireflies provide a spectacular show during summer months, scientists warn that their population is flickering.

Whether you’re a believer or skeptic, World UFO Day on July 2 is an occasion to ponder unexplained phenomena seen over the ...

Scientists are working to understand the curious phenomena of red sprites, green ghosts and blue jets high above ...

The heat waves moving in recent days across Canada, the U.S. and northern Europe are part of a dangerous new climate pattern.

The earliest light in the universe has been traveling across space since just after the Big Bang. Known as the cosmic ...

Experiences of insight come with a burst of brain activity — and a memory boost.

A new study is shedding light on why solar radiation is more effective than other forms of energy at causing water to ...

People are marking the start of the winter and summer solstices across the globe. North of the equator, celebrations welcome ...

Mood can amplify the effect. Research found people who suffered with mental health issues were more likely to experience ...

During the Northern Hemisphere’s summer solstice, the upper half of the earth is tilted toward the sun, creating the longest ...