This year's ozone hole covers most of the Antarctic continent and is among the largest and deepest in recent years.

Halloween time is spider time. Three amazing spider skills you might not have known about.

Fog forms when the air cools and water vapor condenses.

The last time CO2 concentrations reached today’s level was 3 million years ago, during the Pliocene Epoch. Hear from geoscientists who see evolving conditions in the Arctic as an indicator of how climate change could transform the planet.

September 2020 was our planet's hottest September since 1880. With 3 months left, 2020 could rank among the top 3 warmest years on record for the globe.

Satellite imagery has revealed that 2 of the fastest-changing glaciers in Antarctica - Pine Island and Thwaites - are fracturing and weakening faster than ever, a step towards the glaciers' disintegrating and causing sea levels to rise dramatically.

Today, most life on Earth is supported by oxygen. But ancient microbial mats existed for a billion years before oxygen was present in the atmosphere. So what did life use instead?

In the Smoky Mountains, thousands of fireflies flash in unison. Researchers want to know how.

The ice-covered Grímsvötn volcano produced an unusually large and powerful eruption in 2011. Now, says this volcanologist, there are clear signs that Grímsvötn is getting ready to erupt again.

New research suggests that a series of huge volcanic eruptions, 233 million years ago, led to a mass extinction event that heralded the dawn of the dinosaurs.