Tuesday, June 21, 2022
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These polar bears can survive with out sea ice

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A young adult polar bear standing on his hind legs on ice looking into the distance in East Greenland.

Polar bears usually use sea ice to hunt, however a newly recognized group has discovered one other technique.Credit score: Patricia Hamilton/Getty

An remoted inhabitants of polar bears has been found in southeast Greenland, which is freed from sea ice for many of the yr. Polar bears (Ursus maritimus) usually want sea ice to outlive, so the invention is elevating hopes that some members of the species may survive the lack of ice attributable to local weather change. The group, consisting of 27 grownup females, has tailored to looking on the ice that has calved off glaciers — referred to as glacial mélange.

Nature | 4 min learn

The European Area Company (ESA) has authorised a brand new mission, referred to as Comet Interceptor, which is able to launch with none particular goal in thoughts — as a substitute mendacity in await a customer from the outer Photo voltaic System, and even from one other star. The purpose is to discover a pristine comet on a large orbit taking a whole bunch of years, referred to as a long-period comet, that’s coming into the Photo voltaic System for the primary time. It will likely be the primary probe to be parked in area, able to fly to a goal at quick discover.

Nature | 5 min learn

The DNA of greater than 1,200 species of invertebrate, together with spiders and bugs, have been discovered on shop-bought samples of tea and dried herbs. Sounds gross, however these weren’t bug stays — they have been traces of environmental DNA (eDNA), which organisms shed into their environment as they walked throughout, chewed on or in any other case interacted with the leaves. The purpose, say researchers, is to higher perceive how insect populations have modified. “When insect decline research have been first printed, lots of people complained [that] there isn’t a actual long-term knowledge,” says ecological geneticist and co-author Henrick Krehenwinkel. He was impressed by the specimen financial institution at his college in Germany that has been gathering tree samples for 35 years. “And what I requested myself is, ‘Couldn’t you additionally monitor the DNA of the bugs which have lived on this leaf?’”

The Scientist | 7 min learn & Nature Analysis Spotlight | 1 min learn (Nature paywall)

Reference: Biology Letters paper

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