The analysis uncovered several genes that may be involved in the polar bears’ extreme adaptations to life in the high Arctic. The species lives much of its life on sea ice, where it subsists on a blubber-rich diet of primarily marine mammals. The genes pinpointed by the study are related to fatty acid metabolism and […]
The genome sequence of a 24,000-year-old Siberian individual has provided a key piece of the puzzle in the quest for Native American origins. The ancient Siberian demonstrates genomic signatures that are basal to present-day western Eurasians and close to modern Native Americans.
Until now, science has believed that oxygen in the Earth's atmosphere has been around for roughly 2.3 billion years, or roughly half way back along our planet's 4.6 billion year timeline. However, new research results provide evidence that the dating of a so-called â€œGreat Oxygenation Eventâ€ needs a 700- million-year backwards recalibration.
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Many of the large land mammals, such as mammoths and woolly rhinos, didnâ€™t survive the last ice-age. In contrast ocean mammals such as the bowhead whale, which with a lifespan of 200 years is the worldâ€™s longest living mammal, did.
THE SOLAR SYSTEM Some 4.567 billion years ago, our solar systemâ€™s planets spawned from an expansive disc of gas and dust rotating around the sun. While similar processes are witnessed in younger solar systems throughout the Milky Way, the formative stages of our own solar system were believed to have taken twice as long to […]
TEXTILE RESEARCH A piece of nettle cloth retrieved from Denmark's richest known Bronze Age burial mound LusehÃ¸j may actually derive from Austria, new findings suggest. The cloth thus tells a surprising story about long-distance Bronze Age trade connections around 800 BC. The findings have just been published in Nature's online journal Scientific Reports.
Individuals with raised levels of an antibody known as rheumatoid factor in their blood have up to a 26-fold greater long term risk of developing rheumatoid arthritis, finds a study published in British Medical Journal today.
On Mars's poles there are ice caps of ice and dust with layers that reflect to past climate variations on Mars. Researchers from the Niels Bohr Institute have related the layers in the ice cap on Mars's north pole to variations in solar insolation on Mars, thus established the first dated climate history for Mars, […]