The nearly extinct northern white rhino may not be completely lost.
For the first time, white rhinoceros embryos have been made in the lab. Scientists injected preserved sperm from a male northern white rhino into eggs of female southern white rhinos, a closely related subspecies. The embryos were incubated until the cells began to differentiate, a stage at which they can be implanted...
For Daily Use
Take a quiz on web privacy
Private web browsing isn’t nearly as private as many people think.
Major web browsers, such as Google’s Chrome and Apple’s Safari, offer a private browsing option, sometimes known as “incognito.” The option allows people to surf the internet through a private window that doesn’t log activity into the browser’s history or influence future autofill...
The death of physicist Stephen Hawking on March 14 at age 76 sparked a global outpouring of admiration. In our appreciation, Science News physics writer Emily Conover calls him “a black hole whisperer who divined the secrets of the universe’s most inscrutable objects." He was also among the very few cosmologists (hello, Carl Sagan) to have written an international best seller; Hawking...04/05/2018 - 07:53 Science & Society, Physics
August's total solar eclipse won’t be the last time the moon cloaks the sun’s light. From now to 2040, for example, skywatchers around the globe can witness 15 such events.
Their predicted paths aren’t random scribbles. Solar eclipses occur in what’s called a Saros cycle — a period that lasts about 18 years, 11 days and eight hours, and is governed by the moon’s orbit. (Lunar eclipses...
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In August, the United States will experience its first coast-to-coast total solar eclipse in nearly a century. Over the course of an hour and a half, the moon’s narrow shadow will slice across 12 states, from Oregon to South Carolina (SN: 8/20/16, p. 14). As many as 200 million people are expected to travel to spots where they can view the spectacle, in what could become one of the most...
If farmers don’t want big cats to kill their livestock, they should make sure that the kitties have enough wild prey to eat. Lions, tigers and other big cats tend to hunt cattle, goats and sheep only after their regular prey has fallen below certain thresholds, a new study finds.
The seven species that make up the big cats — lions, tigers, jaguars, cougars, leopards, snow leopards and...
There’s a good reason why so many people want to go on an African safari — savannas in Kenya and other countries are home to plenty of large, photogenic animals, including elephants, giraffes and lions. Who wouldn’t want to see those creatures up close?
But there’s something a bit quirky about those savannas. They can be home to 10 or even 25 different species of herbivores that all seem...
The convenience of comparing airfares at a single travel website while browsing from a smartphone is undeniable. But these modern perks can have a hidden cost: Researchers have uncovered multiple instances of travel and retail websites steering customers toward more expensive prices depending on factors such as whether customers are on a mobile phone, use a particular browser or have purchased...
Like every other project, Jänschwalde failed.
In 2008, it was set to become the world’s largest demonstration of just how cleanly coal could be burned to generate electricity. The revamping of an aging power plant in Germany, Jänschwalde was to become a paragon of a technology that can slash up to 90 percent of the carbon dioxide emitted by fossil fuel–burning power plants — the single...
Yes, the shiny purple-green creature above and the sky-blue one below are cockroaches. But they do not at all want to live in your house.
Among the world’s more than 4,600 or so roach species, “people have tended to concentrate on just the boring pest species,” says George Beccaloni, curator of cockroaches and their relatives at the Natural History Museum in London. That’s only about 30...