How and why the octopus, squid, and cuttlefish change colors
The ruby, birthstone for July, is among the most highly prized of gemstones.
These lens-shaped clouds are often mistaken for UFOs. Here’s how they form, plus gorgeous photos and a video.
We can’t get enough of the coolness of octopuses here at Earthsky. Watch what this octopus does with coconut shells.
Solstice – year’s longest day for northern Earth – was Sunday. But hottest weather is still to come. Likewise, coldest weather is ahead for S. Hemisphere.
Scientists think there may be a link between the new volcanic activity at Mount Sinabung in Indonesia and three recent megathrust earthquakes.
We are entering a mass extinction that threatens humanity’s existence, says a new study
It’s due to arrive sometime today (June 22, 2015). NOAA forecasters estimate a 90% chance of polar geomagnetic storms when the CME arrives. Aurora alert!
In Chinese thought, summer has been associated with the color red, the sound of laughing, the heart organ, the fire element and a red phoenix bird.
Why do people gather at Stonehenge in England on the solstice? Info and photos here.
It’s that beautiful time of year again in the N. Hemisphere, when the June solstice – your signal to celebrate summer – is upon us.
New research shows that Earth’s core contains vast amounts of sulphur – 90% of our planet’s sulphur – equivalent to 10% of the mass of the moon.
Bill made landfall late Tuesday morning as a tropical storm. Now weakened, it will produce heavy rain in parts of the south-central U.S. on Wednesday.
It’s possible to see the whole circle of a rainbow – but sky conditions have to be just right. Plus you have to be up high!
Located on the China-Nepal border, Mount Everest – highest mountain on Earth – sits where two of Earth’s great land plates meet. Thus it’s always moving …
Yes, cloning long-extinct dinosaurs is impossible. But even if dinosaur genomes were available, the animals couldn’t simply be plopped anywhere.
Studies had suggested that global warming slowed or paused since 1998. More thorough research shows the global warming “hiatus” likely never happened.
Next time you see a firefly, keep in mind that its flickering isn’t just a wonder of the night. It’s also a unique, and sometimes deadly, language of love.
This May 20 satellite image shows several cloud patterns swirling downwind of the Canary Islands. These cool patterns are called Von Kármán vortices.
A new tectonic model suggests that the continent of North America may have once been attached to Australia.
This year’s monsoon rainfall began on June 5 in southern India. This animation, made from satellite data, shows where the precipitation fell as the season started.