Saturn: Four Rings
Walter A. Feibelman of the University of Pittsburgh … has found evidence indicating a fourth ring [of Saturn].… Every 14.78 years, the rings of Saturn can be seen edge-on from Earth, and the past winter marked one of these opportunities.… The thin ring “extends to more than twice the known ring diameter” (or a total of 340,000 miles), and is so faint it cannot be...
Ask 10 people what makes humans human and you’ll probably get 10 different answers — and then some. From our biased perspective, it’s seemingly simple to come up with many qualities that define the human experience. We love, we laugh. We form deep personal bonds and complex societies. We use language to communicate, art to express ourselves and technology to accomplish complex tasks....05/17/2017 - 11:00 Molecular Evolution
Letters to the Editor
At random05/17/2017 - 10:49 Cancer, Planetary Science
As cells divide and grow, mutations may crop up in cancer-associated genes. A recent study found that more cancer mutations are caused by these random mistakes than other factors, such as environment or inheritance, Tina Hesman Saey reported in “DNA errors play big role in cancer” (SN: 4/15/17, p. 6).
John Day wondered if replication errors are truly random, not just...
Chaco Canyon is a land of extremes. Summer heat scorches the desert canyon, which is sandwiched between sandstone cliffs nearly two kilometers above sea level in New Mexico’s northwestern corner. Bitter cold sweeps in for winter. Temperatures can swing as many as 28 degrees Celsius during the course of a day. Through it all, Chaco Canyon maintains a desolate beauty and a craggy pride as home...
After a recent flurry of news that fang blennies mix an opioid in their venom, a question lingers: What do they need with fangs anyway? Most eat wimpy stuff that hardly justifies whopper canines.
Not that fang blennies are meek fishes.
“When they bite, they bite savagely,” says Bryan Fry of the University of Queensland in Brisbane, Australia. “If these little jobbies were 3 meters...