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Circumhorizon arc or iridescent cloud?
It's easy to confuse a circumhorizon arc with an iridescent cloud, and vice versa. Circumhorizon arcs are more commonly seen at this time of year.
July 1, 2023
What is a derecho? A destructive, bow-shaped storm
A derecho tore across the Midwest on June 29, 2023. These dangerous storms pack strong winds and race over large areas of land. Learn more about derechos here.
June 29, 2023
What is a heat dome? Southern U.S. feeling its effects
What is a heat dome and how does it affect those who are living under one? Learn more about this meteorological phenomenon here.
June 29, 2023
Canadian smoke crosses the Atlantic and reaches Europe
Canadian smoke from raging wildfires has now crossed the Atlantic to darken skies over Europe. The smoke over Europe is high in the atmosphere.
June 28, 2023
Hummingbirds, tiny and colorful: Lifeform of the week
Hummingbirds are tiny, fast and colorful. See some gorgeous photos of these birds and learn more about this fantastic lifeform of the week here.
June 25, 2023
Sea-going search for alien fragments yields odd spherules
Avi Loeb and a team of scientists are combing the ocean floor near Papua New Guinea for alien fragments. They've found some odd tiny metallic spherules.
June 23, 2023
Hurricanes heat the ocean, even far from the storm
Hurricanes heat the ocean and redistribute that heat to other regions. However, they may also help sequester heat by locking it deep in the ocean.
June 23, 2023
Atlantic tropical storms Bret and Cindy
Atlantic tropical storms Bret and Cindy formed in the Atlantic ocean this week. This activity starting near Africa is more common of late summer.
June 23, 2023
We’ve changed Earth’s spin by pumping groundwater
Humans haven been pumping groundwater for agriculture, mining and other uses. This relocation of water has caused Earth's spin to shift slightly.
June 18, 2023
House-sized asteroid followed by bus-sized asteroid
Wednesday's house-sized asteroid was followed by a bus-sized asteroid that passed Earth Thursday. Both were discovered just within the last week.
June 15, 2023
