Mosasaurs were true sea monsters of late Cretaceous seas. These marine lizards—related to modern snakes and monitor lizards—grew as long as fifty feet, flashed two rows of sharp teeth, and shredded their victims with ...
Archaeology
Sep 23, 2019
0
135
The ancient Incan sanctuary of Machu Picchu is considered one of humanity's greatest architectural achievements. Built in a remote Andean setting atop a narrow ridge high above a precipitous river canyon, the site is renowned ...
Earth Sciences
Sep 23, 2019
0
182
For iconic landscapes such as Grand Canyon or the Appalachian Mountains, geological features are an integral part of their appeal. Yet despite the seeming permanence of cliffs, caves, fossils, and other geological highlights, ...
Earth Sciences
Sep 23, 2019
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15
The Sahara Desert is vast, generously dusty, and surprisingly shy about its age. New research looking into what appears to be dust that the Sahara blew over to the Canary Islands is providing the first direct evidence from ...
Earth Sciences
Sep 23, 2019
0
15
Etched onto the steep walls of Arizona's 6,000-foot-deep, 277-mile-long Grand Canyon are clues that chronicle the sweeping changes the region has experienced during the past two billion years. The canyon's colorful layers ...
Earth Sciences
Sep 23, 2019
0
9
Identifying geological features in a densely vegetated, steep, and rough terrain can be almost impossible. Imagery like LiDAR can help researchers see through the tree cover, but subtle landforms can often be missed by the ...
Earth Sciences
Sep 23, 2019
0
31
Over the past 30 years, wildfires have gotten bigger, stronger, and occurred more often. As climates continue to warm, this trend will likely continue, causing disruption to landscapes and water systems alike.
Environment
Sep 23, 2019
0
10
For more than a century, a guiding principle in seismology has been that earthquakes recur at semi-regular intervals according to a "seismic cycle." In this model, strain that gradually accumulates along a locked fault is ...
Earth Sciences
Sep 23, 2019
0
10
The real Jurassic Park was as an ancient landscape home to a vast desert covered mostly in sand dunes as far as the eye could see, where dinosaurs and small mammals roamed southern Utah. The Navajo Sandstone is known for ...
Earth Sciences
Sep 9, 2019
0
70
Boulder, Colo., USA: Arctic sea-ice has decreased rapidly during the last decades in concert with substantial global surface warming. Both have happened much faster than predicted by climate models, and observed Arctic warming ...
Earth Sciences
Aug 30, 2019
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