Reference Terms
from Wikipedia, the free encyclopedia
Pumice
Pumice is a highly vesicular pyroclastic igneous rock of intermediate to siliceous magmas including rhyolite, trachyte and phonolite. Pumice is usually light in colour ranging from white, yellowish, gray, gray brown, and a dull red. Pumice has an average porosity of 90%. Pumice is formed as pyroclastic material is ejected into the air as a froth containing masses of gas bubbles or vessicles, the lava solidifies quickly and the vessicles are contained in the rock.
Related Stories
1
2
Earth & Climate News
July 29, 2025
July 29, 2025 — Researchers are exploring AI-powered digital twins as a game-changing tool to accelerate the clean energy transition. These digital models simulate and optimize real-world energy systems like wind, solar, geothermal, hydro, and biomass. But while ...
July 28, 2025 — Deep in Serbia's Jadar Valley, scientists discovered a mineral with an uncanny resemblance to Superman's Kryptonite both in composition and name. Dubbed jadarite, this dull white crystal lacks the ...
July 27, 2025 — Mesopelagic fish, long overlooked in ocean chemistry, are now proven to excrete carbonate minerals much like their shallow-water counterparts—despite living in dark, high-pressure depths. Using the deep-dwelling blackbelly rosefish, researchers ...
July 27, 2025 — For over two decades, satellites have quietly documented a major crisis unfolding beneath our feet: Earth's continents are drying out at unprecedented rates. Fueled by climate change, groundwater ...
July 27, 2025 — Air pollution isn't just bad for your lungs—it may be eroding your brain. In a sweeping review covering nearly 30 million people, researchers found that common pollutants like PM2.5, nitrogen ...
July 26, 2025 — A new eco-friendly plastic called LAHB has shown it can biodegrade even in the extreme environment of the deep ocean, unlike conventional plastics that persist for decades. In real-world underwater testing nearly a kilometer below the surface, LAHB ...
July 26, 2025 — In 2023, the world’s oceans experienced the most intense and widespread marine heatwaves ever recorded, with some events persisting for over 500 days and covering nearly the entire globe. These ...
July 23, 2025 — Imagine concrete that not only survives wildfires and extreme weather, but heals itself and absorbs carbon from the air. Scientists at USC have created an AI model called Allegro-FM that simulates billions of atoms at once, helping design futuristic ...
July 23, 2025 — Scientists have discovered that pairing bread wheat with a special soil fungus can significantly enhance its nutritional value. This partnership leads to bigger grains rich in zinc and phosphorus—without increasing anti-nutrients that block ...
July 23, 2025 — Scientists in Svalbard were shocked to find rain and greenery instead of snow during Arctic winter fieldwork. The event highlights not just warming—but a full seasonal shift with major consequences for ecosystems, climate feedback, and research ...
July 23, 2025 — A colossal 7.7 magnitude earthquake rocked central Myanmar in March 2025, marking the strongest quake in over a century. What makes this event groundbreaking isn't just the seismic power, it's the ...
July 22, 2025 — Ancient river landscapes buried beneath the East Antarctic Ice Sheet have been uncovered by radar, revealing vast, flat surfaces formed over 80 million years ago before Antarctica froze. These hidden features, stretching across 3,500 kilometers, are ...
Latest Headlines
updated 12:56 pm ET
July 26, 2025 — What would happen if a nuclear war triggered a climate-altering catastrophe? Researchers have modeled how such a scenario could devastate global corn ...
July 22, 2025 — Scientists in Australia have uncovered the biological triggers behind oil production in oats, a discovery that could revolutionize how oats are ...
July 21, 2025 — Millions of tons of plastic in the ocean aren't floating in plain sight—they're invisible. Scientists have now confirmed that the most abundant ...
July 21, 2025 — Beneath Yellowstone’s stunning surface lies a hyperactive seismic world, now better understood thanks to machine learning. Researchers have uncovered over 86,000 earthquakes—10 times more than ...
July 21, 2025 — A scorching marine heatwave from 2014 to 2016 devastated the Pacific coast, shaking ecosystems from plankton to whales and triggering mass die-offs, ...
July 21, 2025 — Gene editing may hold the key to rescuing endangered species—not just by preserving them, but by restoring their lost genetic diversity using DNA from museum specimens and related species. ...
July 19, 2025 — Clear-cutting forests doesn’t just raise flood risk — it can supercharge it. UBC researchers found that in certain watersheds, floods became up to 18 times more frequent and over twice as severe ...
July 17, 2025 — Dogs trained by everyday pet owners are proving to be surprisingly powerful allies in the fight against the invasive spotted lanternfly. In a ...
July 16, 2025 — Hawaiian coral reefs may face unprecedented ocean acidification within 30 years, driven by carbon emissions. A new study by University of Hawai‘i researchers shows that even under conservative ...
July 16, 2025 — An ancient glacier high in the French Alps has revealed the oldest known ice in Western Europe—dating back over 12,000 years to the last Ice Age. ...