6,775 results
6,775 results for: Bears
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Sea squirt’s DNA makes a splash
The DNA sequence of a sea squirt may reveal the origins of vertebrates.
- Archaeology
Maya warfare takes 10 steps forward
The discovery of hieroglyphic-covered steps on the side of a Maya pyramid has yielded new information about warfare between two competing city-states around 1,500 years ago.
- Materials Science
Fracture Protection: Nanotubes toughen up ceramics
The addition of carbon nanotubes to a ceramic material dramatically improves its fracture resistance.
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- Earth
Impurities clock crystal growth rates
A novel method for measuring tiny amounts of hydrogen-containing impurities allows researchers to determine growth rates along different directions in a quartz crystal.
- Plants
Sunflower genes don’t fit pattern
Comparison between crop and wild sunflower genes suggests that the plant followed an easy route to domestication.
- Earth
Oceans Aswirl
Whirls of ocean water up to hundreds of kilometers across create biological oases, transport heat from tropical climes to cooler latitudes, and affect everything from offshore oil platforms to long-distance yacht races.
- Anthropology
Script Delivery: New World writing takes disputed turn
Researchers announced, to considerable controversy, that inscriptions found on artifacts at an Olmec site in southeastern Mexico represented the earliest known writing system in the Americas.
- Earth
It’s high tide for ice age climate change
Tides may sometimes be strong enough to tug Earth into an ice age.
- Anthropology
Lost-and-Found Fossil Tot: Neandertal baby rises from French archive
The approximately 40,000-year-old skeleton of a Neandertal baby, filed and forgotten in a French museum for nearly 90 years, has been recovered by an anthropologist.
- Humans
From the March 8, 1930, issue
LEAVES OLDER THAN GRAND CANYON FOUND Fossil remains of plants found in the walls of the Grand Canyon show that many millions of years ago stunted vegetation of very singular aspect grew in a great, red, sandy floodplain under a semi-arid climate in northern Arizona. This great red land has been found by Dr. David […]
- Health & Medicine
Lung cancer gene has gender bias
The X chromosome's gastrin-releasing peptide receptor gene is turned on by nicotine to produce a protein that promotes lung cancer, a combination of factors that could explain why women are more susceptible to the disease than men are.
