6,875 results
6,875 results for: Bears
- Archaeology
New Guinea’s Neolithic period may have started without outside help
Islanders on New Guinea experienced cultural changes sparked by farming about 1,000 years before Southeast Asians arrived, a study suggests.
- Earth
Plate tectonics may have started 400 million years earlier than we thought
Magnetic minerals in ancient rocks suggest that plate tectonics may have been under way as early as 3.2 billion years ago.
- Archaeology
The Nazareth Inscription’s origins may refute ties to Jesus’ resurrection
Chemical analysis shows the tablet’s marble came from a Greek island, challenging the idea the decree concerned early Christianity in the Middle East.
- Environment
A year long expedition spotlights night life in the Arctic winter
Scientists anchored to an ice floe near the North Pole are investigating how life survives polar night and what changes will occur as the Arctic continues to warm.
- Climate
Bering Sea winter ice shrank to its lowest level in 5,500 years in 2018
Peat cores that record five millennia of climate shifts in the Arctic region suggest recent ice loss is linked to rising carbon dioxide levels.
- Life
How tardigrades protect their DNA to defy death
Tardigrades encase their DNA in a cloud of protective protein to shield from damage by radiation or drying out.
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Susan Milius, your guide to the peculiarities of nature
Editor in chief Nancy Shute writes about the rambling route Susan Milius, life sciences writer, took before landing at Science News. And how we're all richer for her writing.
- Health & Medicine
A bioethicist says scientists owe clinical trial volunteers support
Researchers should be aware that many insurance policies do not cover experimental procedures, including side effects that may happen afterward.
- Science & Society
All kinds of outbreaks, from COVID-19 to violence, share the same principles
Adam Kucharski talks about his new book ‘The Rules of Contagion,’ a timely read during the coronavirus pandemic.
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- Space
Phosphorus, a key ingredient of life, has been found in a newborn star system
Astrochemists map phosphorus-bearing molecules in a star-forming cloud, giving clues to how this vital element may have arrived on Earth.
- Earth
Chicxulub collision put Earth’s crust in hot water for over a million years
An asteroid impact 66 million years ago caused hot fluids to circulate in the crust, creating conditions that may have been ideal for microbial life.
