Taxonomy term

august 2017

Earth-like exoplanet shows signs of supporting life

A recently discovered exoplanet 40 light-years from Earth appears to orbit its home star at a distance suggesting it could support liquid water. The planet, dubbed LHS 1140b and reported in a study in Nature, is located in the constellation Cetus and orbits a red dwarf star. The rocky planet is 10 times closer to its star than Earth is to the sun, but the red dwarf only puts out a fraction of the light that the sun does, meaning LHS 1140b lies in the middle of the habitable zone around the star.

24 Jul 2017

Lidar sheds light on roadside rockfall hazard

Rockfalls represent a significant hazard on many U.S. roadways that wind through steep terrain. But with money tight for roadside hazard mitigation, engineers are looking for more efficient ways to assess where and when unstable slopes could give way. In a new study, researchers suggest that lidar might be a cost-effective solution.

21 Jul 2017

Horned dinosaur find a first for eastern North America

Fossils of horned dinosaurs called ceratopsids, the group that includes Triceratops, are usually found in either western North America or Asia. But the discovery of a single ceratopsid tooth in Mississippi, reported in a new study in PeerJ, hints that this group spread into new territory at the tail end of the Mesozoic Era — just prior to going extinct.

20 Jul 2017

Massive trove of dinosaur tracks cataloged in Australia

In a remote region of Western Australia, paleontologists have documented the world’s most diverse assemblage of dinosaur tracks. The scientists found preserved in Early Cretaceous rocks thousands of tracks, 150 of which can be assigned to at least 11, and possibly as many as 21, different known track types representing theropods, sauropods, ornithopods and armored thyreophorans.

18 Jul 2017

In a position to lead: How military technology and innovation can ease the world's water challenges

Given the scale and resources of the U.S. military, as well as its need for resilient water systems wherever it operates, the military is driving innovation in the water sector, which could benefit communities around the world. 

17 Jul 2017

Bottom dropping out of coral reefs

Coral reefs provide habitat for 25 percent of all marine life, support fishing and tourism economies, and protect shorelines from surging waves and storms. But since the 1970s, coral populations have been waning because of warming waters, coastal development and pollution. Recently, scientists studying several beleaguered reef systems have discovered an unexpected consequence of their decline — the seafloor around the reefs is eroding, leaving coastal communities more vulnerable to high winds and waves.

17 Jul 2017

Mastodon bones point to significantly earlier human presence in North America

In 1992, paleontologists from the San Diego Natural History Museum discovered a set of fossil bones, tusks and teeth from a single mastodon next to state highway 54 south of San Diego. Archaeologists were soon called to investigate the site, which also featured several large cobblestones — unique in the otherwise sandy matrix surrounding the bones — that seemed to have been used to break open the mastodon’s long bones, hinting at human activity soon after the animal’s death. A reliable age for the intriguing find has eluded scientists for more than two decades, but in a study released today in Nature, researchers who successfully dated the bones have come to a sensational conclusion: The site appears to date back roughly 130,000 years, more than 100,000 years before humans are thought to have lived in North America.

26 Apr 2017