Fireflies: How and why they light up

A firefly's familiar glow is caused by a chemical reaction. Why and how fireflies light up here, plus many wonderful firefly photos.

A word about Earth’s water cycle

Earth's water cycle is vital to life. Although the amount of water on Earth is fixed, it continually cycles between the oceans, atmosphere and land.

Self-driving taxis take to the streets of San Francisco

Phoenix, Arizona, already has self-driving taxis, and now San Francisco, California, becomes the 2nd major U.S. city to have them.

Why are Uranus and Neptune different colors?

A new study shows that Uranus and Neptune are different shades of blue due to a layer of excessive haze on Uranus. This makes its atmosphere look lighter.

More UFO hearings? Congressman weighs in

In a new interview with Event Horizon, congressman Raja Krishnamoorthi talks about the historic May 17 UFO hearing and the prospects for more UFO hearings.

Slow-spinning neutron star: A new class of object?

Slow-spinning neutron star PSR J0941-4046, sending out unusual radio waves, challenges our understanding of how neutron stars are born and evolve.

Helioconjunction of Jupiter and Neptune on June 6

There will be a helioconjunction of Jupiter and Neptune on June 6, 2022. That is, as seen from the sun, Jupiter will overtake Neptune.

Planetary defense exercise: This was only a test

As a planetary defense exercise, scientists used a recent approach of Apophis as a test to see how quickly they could track and identify a hazardous asteroid.

Blue Origin’s NS-21 space tourism launch: Watch here June 4

Watch the launch of Blue Origin's NS-21 mission featuring the youngest-ever American woman to go to space - here.

New record: Tonga volcano biggest of 21st century

The Hunga Tonga-Hunga Ha’apai eruption was the largest of the 21st century, and the explosion matched the eruption of Krakatoa in 1883.