Sarah Kaplan

Carbon dioxide in the atmosphere hit “next-level” highs, scientists say. Earth’s ecosystems breaking down under extreme temperatures could be the cause.

Just 5.53 million square miles of ice had formed as of March 22, the smallest maximum extent since satellite recordkeeping began in the 1970s.

In a village that was relocated to make room for a military base, Greenlanders are still living with the legacy of the last time the United States took an interest in their island.

Scientists warn that the Alaska volcano Mount Spurr is likely to erupt soon, showering ash on Anchorage and potentially disrupting air travel.

A recent study underscores how humanity’s success in extinguishing fires has allowed dead wood and other flammable material to pile up in ecosystems, putting communities at greater risk of catastrophic fires as the planet warms.

Two weeks after fires consumed huge swaths of Los Angeles, officials are still trying to identify victim’s remains and bring closure to families left in limbo.

The southern resident killer whale, known as Tahlequah, has now lost another calf in what the Center for Whale Research called “devastating” news.

Clam shells could help scientists understand the Atlantic Ocean’s sensitive circulation system — and predict when that crucial system might catastrophically collapse.

Weeks after being swept away in floodwaters, a North Carolina grandmother is among an untold number of victims who remain unaccounted for after Hurricane Helene.

Of more than 500 hurricanes that have hit the United States, the average storm led to up to 11,000 excess deaths, hundreds of times higher than official estimates.

An effort to understand Earth’s past climates uncovered a history of wild temperature shifts and offered a warning on the consequences of human-caused warming.

Emissions of methane — a powerful greenhouse gas — are rising at the fastest rate in recorded history, scientists said Tuesday, defying global pledges to limit it.

There is a secret landscape beneath every field of wildflowers. A place inhabited by beings just as varied and beautiful as the blossoms above. This is the world of seeds.

Americans disproportionately move to fire- and flood-prone counties, but high insurance costs and climate change awareness may be shifting migration trends, per new data.

This week marked the apex of an unprecedented hot streak that toppled records and left communities and ecosystems reeling.

The historic day comes on the heels of 13 straight months of unprecedented temperatures and the hottest year scientists have ever seen.

Researchers warn the hazards of climate change will only get worse, for the planet and the economy. Items as varied as groceries and insurance will get more expensive.

For the first time ever, researchers have detected a significant dip in atmospheric levels of hydrochlorofluorocarbons -- harmful gases that deplete the ozone layer and warm the planet.

Each of the past ten months has been the hottest on record – an unprecedented streak of unprecedented temperatures that has fueled alarm among climate scientists.

Climate change and rising fuel costs threaten an remote Arctic community. Can renewable energy help preserve their traditional way of life?