Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week s contribution is from Conor Nixon, research space scientist with the NASA Goddard Space Flight Center.
In 1989, NASAâs Voyager 2 spacecraft made an incredible discovery â geyser activity on Triton, a moon of Neptune. It was the first time a geyser had been observed away from Earth (not counting the volcanic eruptions discovered on Jupiterâs moon Io by Voyager 1 in 1979). In the decades that followed, geysers were discovered on even more moons in the outer solar system.
This two-image mosaic is one of the highest-resolution views acquired by the Cassini spacecraft during its imaging survey of the geyser basin capping the southern hemisphere of Saturn s moon Enceladus.
Nora returns to the Oregon Zoo
Nora is back at the Oregon Zoo.
After spending the past few years at Utah s Hogle Zoo, the 5-year-old polar bear returned to the zoo in Southeast Portland late Tuesday, March 9, even as operators were putting the finishing touches on the new Polar Passage habitat. Seeing Nora this morning was so exciting, said Nicole Nicassio-Hiskey, the zoo s senior marine life keeper, who worked closely with the young bear during her previous time in Portland. She has grown into a beautiful bear. Her coat looks great and she seems very comfortable already she has been taking dips and splashing around.
CHRIS HUBBUCH
Wildlife officials are asking aquarium owners to destroy their âmoss ballsâ after invasive zebra mussels were found on some of the ornamental plants.
The U.S. Geological Survey warned Monday that the destructive shellfish have been found in pet stores in at least 21 states including Wisconsin.
âThe issue is that somebody who purchased the moss ball and then disposed of them could end up introducing zebra mussels into an environment where they werenât present before,â said Wesley Daniel, the USGS biologist who discovered the problem. âWeâve been working with many agencies on boat inspections and gear inspections, but this was not a pathway weâd been aware of until now.â
Total shipments of Portland and blended cement, including imports, in the USA and Puerto Rico increased 13 per cent YoY to 7.5Mt in December 2020, acco.