Reference Terms
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Weather
Weather is a term that encompasses phenomena in the atmosphere of a planet. The term is normally taken to mean the activity of these phenomena over short periods of time, usually no more than a few days. Average atmospheric conditions over significantly longer periods are known as climate. Usage of the two terms often overlaps and the physical concepts underlying them are closely related. On Earth, regularly occurring weather phenomena include such things as wind, cloud, rain, snow, fog and dust storms. Less common events include natural disasters such as tornadoes, hurricanes and ice storms. Almost all familiar weather phenomena occur in the troposphere (the lower part of the atmosphere). Weather does occur in the stratosphere and does affect weather lower down in the troposphere, but the exact mechanisms are poorly understood.
The Earth's atmosphere is a chaotic system, so small changes to one part can have large effects elsewhere. This makes it very difficult to accurately predict weather changes more than a few days in advance, though weather forecasters are continually working to extend this limit through the scientific study of weather, meteorology.
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Earth & Climate News
May 20, 2026
May 20, 2026 Scientists in Canada have discovered that ancient underground rocks are naturally producing hydrogen gas — and lots of it. Measurements from mine boreholes in Ontario show the gas can flow continuously for years, offering a potential new source of ...
May 20, 2026 For decades, scientists believed ancient humans avoided dense rainforests, treating them as nearly impossible environments for early survival. But a groundbreaking discovery in West Africa is rewriting that story. Researchers uncovered evidence that ...
May 20, 2026 Scientists in Australia are using cutting-edge DNA techniques to help save one of the world’s rarest marsupials — the critically endangered Gilbert’s potoroo, with fewer than 150 left in the wild. By analyzing tiny traces of DNA in the ...
May 19, 2026 Scientists have uncovered an astonishing new chapter in humpback whale migration: two whales were found to have traveled between breeding grounds in Australia and Brazil, crossing more than 14,000 kilometers of open ocean. One whale shattered ...
May 19, 2026 A hidden network of earthquake faults running beneath Seattle may be far more active than scientists realized. New research reveals that smaller “secondary” faults in the Seattle Fault Zone ...
May 19, 2026 Antarctica’s Hektoria Glacier collapsed with shocking speed, retreating 15 miles in only 15 months and setting a modern record for grounded ice loss. Scientists say warming conditions and ...
May 17, 2026 Scientists have uncovered evidence that the vanished Tethys Ocean may have sculpted Central Asia’s mountainous landscape during the dinosaur era. Using decades of geological data, researchers found that distant tectonic activity linked to the ...
May 16, 2026 Rivers around the world are quietly running out of oxygen — and climate change is emerging as the main culprit. A sweeping global analysis of more than 21,000 river systems found that nearly 80% have been steadily losing dissolved oxygen over the ...
May 16, 2026 A mysterious underwater fault near Ecuador has been producing nearly identical magnitude 6 earthquakes every five to six years, baffling scientists for decades. Researchers now believe the fault contains hidden “brake zones” where seawater and ...
May 14, 2026 Deep beneath Portugal’s São Jorge Island, a massive surge of magma silently pushed upward from more than 20 kilometers underground in 2022, triggering thousands of earthquakes and briefly raising ...
May 14, 2026 Scientists exploring deep underwater canyons off the coast of Western Australia uncovered a hidden world packed with bizarre and elusive marine life — including signs of the legendary giant squid. By analyzing traces of DNA floating in seawater ...
May 13, 2026 A remote island between Australia and Antarctica is showing signs of a dramatic climate transformation. Scientists found storms over Macquarie Island now unleash much heavier rainfall than they did ...
Latest Headlines
updated 12:56 pm ET
May 14, 2026 Scientists have finally cracked the mystery behind one of climate change’s strangest fingerprints: while Earth’s surface heats up, the upper atmosphere is rapidly cooling. Researchers at Columbia ...
May 14, 2026 Researchers in Japan traced a hidden medieval solar storm using ancient tree rings and centuries-old sky observations. The team linked reports of ...
May 13, 2026 Humans may have returned to Britain far earlier than scientists once believed — not long after the last ice sheet began retreating. New evidence ...
May 13, 2026 Researchers have uncovered unexpectedly high levels of silicone-based pollutants called methylsiloxanes floating through the atmosphere across cities, rural regions, and even forests. Much of the ...
May 12, 2026 Researchers created a special kind of algae that can grab microscopic plastic pollution out of water almost like a magnet. The algae produce limonene, an orange-scented oil that helps them bind to ...
May 11, 2026 The Toba supereruption 74,000 years ago was so massive it may have plunged Earth into years of darkness and cold, leading some scientists to believe ...
May 10, 2026 A team at the University of Hong Kong has developed a new “super steel” that can survive the harsh conditions needed to make green hydrogen from seawater. The material uses an unexpected ...
May 10, 2026 A colossal underwater volcano in the South Pacific may have revealed a surprising new weapon against climate change. After the 2022 eruption of Hunga Tonga–Hunga Ha’apai, scientists detected ...
May 10, 2026 Scientists have uncovered strong evidence that a major Atlantic Ocean current system tied to global climate is weakening. The slowdown has been ...
May 10, 2026 Scientists have uncovered a hidden Antarctic threat that could accelerate global sea level rise far faster than expected. Deep beneath floating ice ...