Taxonomy term

july 2016

Giant armadillo look-alikes really were giant armadillos

Due to coincidences of evolution, extinct creatures sometimes resemble living animals, even if they’re not actually related. But in a new study looking at the family tree of glyptodonts, armored beasts resembling giant armadillos that once roamed South America, researchers have found that the animals actually were early relatives of modern armadillos.

24 Jun 2016

Statistics shine light on T. rex family tree

Tyrannosaurus rex is one of the most recognizable dinosaurs, but the tyrannosauroid family tree is also occupied by many lesser-known cousins — such as Xiongguanlong and Lythronax — along with some large holes. Now, researchers have produced a new phylogenetic family tree including all of the known tyrannosauroid species that highlights the largest remaining gaps and provides clues as to how they might be filled.

22 Jun 2016

Fossil dinosaur illuminates evolution of tyrannosauroid body sizes

Tyrannosauroid dinosaurs were the dominant predators of the terrestrial ecosystems in which they roamed for much of the Late Cretaceous, from about 80 million to 66 million years ago. Some, like Tyrannosaurus rex, reached lengths up to about 13 meters and heights of nearly 4 meters. Their large size and keen senses — relatively large nasal passageways suggest a heightened sense of smell — are considered to have been keys to their success.

 
22 Jun 2016

Searching for the ancestors of meandering rivers

It might be difficult to imagine Earth devoid of vegetation, but for billions of years the sun shone, winds blew and rivers flowed on a planet without any plants.

21 Jun 2016

Bringing geoscience to bear on the problem of abandoned mines

With 3 million gallons of acidic, heavy-metal-laden water behind an earthen plug at high elevation, Colorado’s Gold King Mine was, literally, a situation just waiting to go downhill. The blowout last August shone a spotlight on the larger problem of abandoned mine lands. What role do geoscientists play in solving it?

19 Jun 2016

A new gravity map of Earth

Gravity differs from place to place around Earth because of the uneven distribution of mass across and within the planet. Scientists can study the variation in gravitational pull by measuring the gravity field at different places on the surface of the planet. In a new study published in Scientific Reports, gravity field data collected over the entire planet between 2009 and 2013 by the European Space Agency’s Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) satellite has been mapped, revealing many of Earth’s internal features, such as magmatic plumes welling up toward the surface.

17 Jun 2016

A labyrinth of silver mines uncovered on the shores of the Aegean Sea

By the fifth and fourth centuries B.C., silver mines under the ancient Greek city of Thorikos, now known as Lavrio, were the most important mines in Greece. Recent underground exploration of the network of tunnels found at the foot of the city’s Mycenaean-aged Acropolis is shedding new light on the scale — and miserable conditions — of the mines.

16 Jun 2016

Geomedia: Film: 'A Beautiful Planet' inspires with vivid views of life on and off Earth

An endless sea of bright dots surrounds you amid the otherwise darkened expanse as you slowly approach a swirling, recognizable cloud of glowing light — the Milky Way. As the galaxy grows to fill the screen, you feel as if you are heading home toward Earth. This sensation of being a crewmember on a spaceship stays with you throughout the new documentary film, “A Beautiful Planet,” as well as after it’s over — which is just what the filmmakers intended.

29 Apr 2016

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