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Although Joaquin Is Increasingly Likely to Stay at Sea, It Is Still Expected to Produce a "Truly Historic" Wind Event

With 130 mile per hour winds, Hurricane Joaquin has now spun up into a dangerous Category 4 storm — and some additional strengthening is possible, according to this evening's forecast discussion page of the National Hurricane Center.

Latest Update: Strong El Niño Persists, And It's Likely to Continue Into Spring. Here's Why.

Even as El Niño has strengthened over the past few months, it has always been possible that it would stall.

Dramatic Evolution of Hurricane Joaquin Captured By a Rapid-Scanning Satellite

Drawing energy from record-warm waters at the surface of the Atlantic Ocean, Hurricane Joaquin has grown into a dangerous Category 3 storm with sustained winds of 115 miles per hour.

Watch Out For Joaquin

A tropical depression that formed Sunday in the Atlantic has strengthened into a tropical storm that at the very least will bring a lot of rain to the U.S.

Spectacular Imagery Reveals Traces Believed to Come From Liquid Water Flowing on Today's Mars

If you've paid attention to the news at all today, you've probably heard about the compelling new evidence that liquid water flows on Mars — present tense.

Polar Bears May Be Starving in the Barents Sea Area, But Thanks to Russia We Don't Know If It's Climate Change

Arctic sea ice has likely reached it's minimum geographic extent for 2015, coming in at fourth lowest in the satellite record and continuing a long-term downward trend, according to a just-released update from the National Snow and Ice Data Center.

As Summer Finishes as Warmest on Record, A Postcard From Global Warming's Ground Zero

The summer of 2015 — the months of June, July and August — was the warmest on record for the globe, according to the latest figures from NASA.

Arctic Sea Ice Heading for One of Lowest Extents on Record

When I heard the news from the National Snow and Ice Data Center that Arctic sea ice will likely reach its third or fourth lowest minimum extent on record in coming weeks, I started looking for a compelling image to illustrate what's happening — one a bit more interesting than a map or graph.

First Time on Record: Three Category-4 Hurricanes Swirl East of the International Dateline at the Same Time

The unusually warm waters of the Pacific Ocean have helped spawn three hurricanes in the Pacific Ocean.

U.S. Wildfires: Glow is Bright Enough to be Seen From Space

Wildfires are burning hot and bright across portions of the Western United States — so much so that their glow is visible from space.

Wildfire Smoke Drifts Across 1,000 Miles of the West

Strong winds blew through Washington State yesterday (Aug. 19), whipping up wildfires and causing them to run into new territory.

Among 1,626 Months in a Record Dating to 1880, July 2015 Was the Warmest Ever

Last week, analyses by NASA and the Japan Meteorological Agency showed that July 2015 was the warmest such month on record.

The West's Wildfire Surge: It's Nasty, It Could Set a Record. But Should We Cool the Rhetoric a Little?

As of today (Aug. 19), 78 large fires were burning across 1,260,830 acres in ten states, most of them in the western United States, according to the National Interagency Fire Center (NIFC).

Two Analyses Find That July 2015 Was Warmest on Record. World Likely Headed for Warmest Year As Well.

Last month was the warmest July on record globally, according to independent analyses by NASA, and by the Japan Meteorological Agency.

WATCH: Animation of Satellite Images Shows Smoke Plume From Mammoth Explosions in Tianjin, China

Cameras are everywhere now. So it's no surprise that the mammoth explosions in Tianjin, China, and the devastation they wrought, have been documented in grim detail — from the blinding flashes and fireballs, to a poor soul blown away on camera at the entrance to a building, to astonishingly detailed before and after views of the site captured by satellite.

Summer of Misery: Rampaging Floods and Raging Fires

We live on a dynamic planet, so we shouldn't be surprised when rampaging floods and raging fires cause a great deal of misery at the same time.

Latest El Niño Forecast: Expect It to Last Into Spring and Possibly Peak as One of the Strongest on Record

A new El Niño forecast is out, and while it may not be terribly surprising, it's still worth noting:  El Niño will almost certainly be hanging around for at least the next seven months, and probably more.

WATCH: Striking Animation Shows Prodigious — and Deadly — Rainfall from Typhoon Soudelor

Super Typhoon Soudelor may be spinning off into memory now, but I nonetheless thought I'd share this extraordinary animation of the storm's accumulated rainfall as it charged toward, and then over, Taiwan between Aug.

Record Algae Bloom Laced With Toxins is Flourishing in "The Blob" — and Spreading in the North Pacific

It has been called "The Blob," a gigantic patch of abnormally warm water sitting in the Northeast Pacific Ocean for months.

On the 70th Anniversary of Hiroshima Bombing, Photos Document the Devastation. Plus: Personal Reflections.

Seventy years ago today, the crew of the Enola Gay B29 bomber, acting on behalf of the citizens of the United States and the Allies of World War II, dropped an atomic bomb on Hiroshima, Japan.