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Today's landscape on the Faroe Islands. Image credit: Eyðfinn Magnussen

Life sciences

25 Nov 2024

Viking colonizers of Iceland and nearby Faroe Islands had very different origins, study finds

Geneticists have studied the distribution of Y-chromosome haplogroups on the Faroe Islands, known to have been colonized by Vikings around the year 900 CE, and compared these to distributions of haplogroups in today’s Scandinavia. They showed with novel analysis methods that the haplotype distribution in the Faroe Islands most closely resembled that in Norway and Denmark, and to a lesser extent that in Sweden, but differed from that in Iceland. They concluded that a band of Viking men from all over Scandinavia colonized the Faroe Islands, which differed in their geographical origin and genetic make-up from those who settled Iceland.

The study’s co-authors Argel Horton and Laura Arton apply the chlorine paste to a large coral (Orbicella annularis). The bright white area is where the treatment has already been applied. Image: Dr Graham Forrester.

Life sciences

14 Nov 2024

Chlorine and cocoa butter could protect corals from disease and decrease antibiotic pollution of the oceans

Researchers found that chlorine mixed with cocoa butter is effective at treating diseased corals, which could reduce negative side effects of antibiotic treatments on ocean ecosystems

Planting Abies religiosa (Sacred fir) seedlings under the shade of pre-existing shrubs (Senecio cinerarioides, narrow green-greyish foliage) as protective “nurse plants”. Large trees on background are adult Pinus hartwegii, the pine that reaches the timberline. Abies religiosa is completely absent in this site at 3800 meters of elevation, northeaster slope of Nevado de Toluca volcano, central Mexico, because it is too high in elevation. Planters personnel are locals of Native Indian origin. Image credit: Cuauhtémoc Sáenz-Romero, UMSNH

Life sciences

18 Oct 2024

Scientists create new overwintering sites for monarch butterflies on a warming planet

Migrating monarch butterflies depend on mountain forests of sacred firs in Mexico as overwintering sites. These forests are under threat from global warming. But researchers from Mexico have now shown that seedlings derived from their original range can be transplanted successfully to a new site further east, on the higher and colder volcano Nevado de Toluca. The resulting new stand of sacred firs could ultimately serve as the overwintering sites of the future.

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