Tag Archive for 'Climate'

Lava streaming from an active vent during the 2018 eruption of Kīlauea volcano. Image credit: U.S. Geological Survey.

Extreme Rainfall Triggered 2018 Eruption of Kilauea Volcano, Researchers Say

Apr 23, 2020 by News Staff

The 2018 eruption of Kīlauea volcano in Hawaii was likely initiated by prolonged, and at times extreme, rainfall in the months leading up to the event,...

Reconstruction of the West Antarctic mid-Cretaceous temperate rainforest. The painting is based on paleofloral and environmental information inferred from palynological, geochemical, sedimentological and organic biomarker data obtained from cores at the site of PS104_20-2, Antarctica. Image credit: J. McKay / Alfred-Wegener-Institut / CC-BY 4.0.

90-Million-Year-Old Fossilized Rainforest Discovered in Antarctica

Apr 3, 2020 by News Staff

An international team of paleontologists and geologists has uncovered well-preserved fossilized roots, pollen and spores of 90-million-year-old (mid-Cretaceous...

The newly-discovered mammoth-bone structure at the site of Kostenki 11; the two visible scales are 5 and 6 m long, respectively. Image credit: A.E. Dudin.

Archaeologists Unearth 22,500-Year-Old Mammoth-Bone Structure

Mar 19, 2020 by Enrico de Lazaro

An international team of archaeologists led by the University of Exeter has discovered a new circular mammoth-bone feature at the Paleolithic site of Kostenki...

2020 CD3 is estimated to be only between one and six meters across. Image credit: Jonny Lindner.

Study: 70 Million Years Ago Day Lasted 23.5 Hours, Year Had 372 Days

Mar 10, 2020 by News Staff

Torreites sanchezi, an extinct species of rudist clam that lived during the Cretaceous period, some 70 million years ago, grew fast, laying down daily...

This high-resolution image of Pluto was taken by New Horizons on July 14. Pluto’s surface sports a remarkable range of subtle colors, enhanced in this view to a rainbow of pale blues, yellows, oranges, and deep reds. Many landforms have their own distinct colors, telling a complex geological and climatological story that scientists have only just begun to decode. Image credit: NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute.

Pluto’s ‘Nitrogen Heart’ Controls Its Atmospheric Circulation: Study

Feb 5, 2020 by News Staff

Pluto’s famous heart-shaped structure, named Tombaugh Regio, controls winds in the atmosphere of the dwarf planet and may give rise to features on its...

On Earth, the Northern and Southern lights occur when the solar wind (electrically charged particles from the Sun) follow our planet’s geomagnetic field lines to the poles and collide with the upper atmosphere. Mars lacks a global magnetic field, so instead the solar wind piles up in front of Mars in a bow shock, which blocks charged particles from reaching the bulk of the atmosphere. However, in a process first observed by NASA’s MAVEN spacecraft, some solar wind protons can slip past the bow shock by first bonding with electrons from the Martian upper atmosphere to form hydrogen atoms. Because these hydrogen atoms are electrically neutral, they can pass through the bow shock and go on to create an ultraviolet proton aurora on the dayside of Mars. Image credit: NASA’s Goddard Space Flight Center.

‘Proton Aurora’ is Most Common Type of Aurora on Mars, Researchers Say

Dec 13, 2019 by News Staff

Proton aurora, a type of Martian aurora first identified in 2016, forms when protons from the solar wind interact with hydrogen in the extended portions...

A range of now extinct megafauna that was present when humans first arrived in Australia. Image credit: Peter Trusler, Monash University.

Study: Humans and Climate Change Drove Australian Megafauna to Extinction

Dec 2, 2019 by News Staff

Ancient Australia’s super-sized animals, the megafauna, became extinct about 42,000 years ago, but the role of humans in their demise has been debated...

The rise of the Neo-Assyrian Empire occurred during a two-centuries-long interval of anomalously wet climate in the context of the past 4,000 years, while megadroughts during the early-mid 7th century BCE, as severe as recent droughts in the region but lasting for decades, triggered a decline in Assyria’s agrarian productivity and thus contributed to its eventual political and economic collapse. Image credit: Carole Raddato / CC BY-SA 2.0.

Megadroughts Likely Triggered Fall of Neo-Assyrian Empire

Nov 14, 2019 by News Staff

Climate-related megadroughts built the foundation for the collapse of the Neo-Assyrian Empire (912 to 609 BCE), the largest and most powerful empire of...

Ancient humans. Image credit: sjs.org / CC BY-SA 3.0.

Origin of Anatomically Modern Humans Traced to Southern Africa

Oct 29, 2019 by News Staff

The earliest ancestors of anatomically modern Homo sapiens emerged in a region south of the Zambezi River in Botswana, Africa, according to a new analysis...

The Akkadians (left) and the Gutians (right). Illustration by H.L. Bacon.

Cold Winters and Strong Winds Contributed to Akkadian Empire Collapse, Study Suggests

Oct 25, 2019 by News Staff

The Akkadian Empire, the first united empire in Mesopotamia, was established around 2300 BCE and abruptly collapsed two centuries later. According to a...

Venus in real colors, processed from Mariner 10 images. Image credit: Mattias Malmer / NASA.

Venus May Never Have Been Wet and Warm World

Oct 16, 2019 by News Staff

A team of planetary researchers from the Lunar and Planetary Institute (LPI) and elsewhere has found that a volcanic flow on Venus’ Ovda Regio highlands...

Observations suggest Venus may have had water oceans in its distant past; a land-ocean pattern like that above was used in a climate model to show how storm clouds could have shielded ancient Venus from strong sunlight and made the planet habitable. Image credit: NASA.

Venus May Have Been Habitable for Three Billion Years

Sep 23, 2019 by News Staff

The Venusian climate remained stable and temperate for about three billion years, until a mysterious global event resurfaced around 80% of the planet,...

A composite image of Venus as seen by JAXA’s Akatsuki spacecraft. Image credit: Institute of Space and Astronautical Science / Japan Aerospace Exploration Agency.

Unidentified ‘Absorbers’ Soak Up Solar Energy in Upper Cloud Layer of Venus

Sep 4, 2019 by News Staff

Venus’ surface has never been seen by the human eye because of opaque, highly reflective clouds which permanently cover the planet. What is curious about...

An artist’s rendering of potentially habitable exoplanets, plus Earth (top right) and Mars (top center). Image credit: PHL@UPR Arecibo, phl.upr.edu / NASA / ESA / Hubble.

Alien Life on Some Extrasolar Planets Could Be More Diverse than on Earth

Aug 26, 2019 by News Staff

In a new study, University of Chicago researcher Stephanie Olson and colleagues modeled climates and ocean habitats of different types of extrasolar planets...

Pavement burns account for significant burn-related injuries in the Southwestern United States and other hot climates with nearly continuous sunlight and daily maximum temperatures above 100 degrees Fahrenheit (38 degrees Celsius). Image credit: Johannes Plenio.

Study: In Hot Climates, Pavements Can Be Hot Enough to Cause Second-Degree Burns within Seconds

Aug 1, 2019 by News Staff

In a study published recently in the Journal of Burn Care & Research, a team of researchers reviewed all pavement burn injury admissions into a Las...

NASA’s Mars rover Curiosity imaged these drifting clouds on May 7, 2019. These are likely water-ice clouds about 19 miles (31 km) above the surface. Image credit: NASA / JPL-Caltech.

‘Meteoric Smoke’ May Play Key Role in Formation of High-Altitude Clouds on Mars

Jun 19, 2019 by News Staff

Planetary scientists have long observed water-ice clouds in the Martian middle atmosphere (18.6-37.2 miles, or 30-60 km, above the surface). Now, a University...

Dr. Blättler with a vial of 20,000-year-old seawater. Image credit: Jean Lachat.

20,000-Year-Old Seawater Found Trapped in Limestone from Maldives

May 28, 2019 by News Staff

A team of researchers from Princeton University and Universities of Miami and Chicago has found drops of ancient seawater in the sediment cores from the...

A view of Mars showing the planet’s northern polar ice cap. Image credit: ISRO / ISSDC / Emily Lakdawalla.

Planetary Scientists Find Ancient Ice Caps beneath Martian North Pole

May 28, 2019 by News Staff

Planetary researchers using data from the Shallow Radar (SHARAD) instrument on NASA’s Mars Reconnaissance Orbiter have discovered rich deposits of water...

This image depicts a Pleistocene landscape in northern Spain with woolly mammoths (Mammuthus primigenius), equids, a woolly rhinoceros (Coelodonta antiquitatis), and European cave lions (Panthera leo spelaea). Image credit: Mauricio Anton.

Study: Neanderthals, Woolly Mammoths Shared Genetic Traits

Apr 10, 2019 by News Staff

Neanderthals and woolly mammoths (Mammuthus primigenius) co-existed in similar geographic and environmental European settings during the Middle and Upper...

View of Pit 1 of the Terracotta Army showing the hundreds of warriors once armed with bronze weapons. Image credit: Xia Juxian.

Archaeologists Solve Mystery of Terracotta Army’s Pristine Weapons

Apr 5, 2019 by News Staff

The world-famous Terracotta Army of Xi’an is an array of life-sized, realistic ceramic figures representing warriors, stationed in three large pits within...

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