Authorities said there is an "epidemic on the Eastern Shore" of wildlife-poisoning crimes because it's "cheaper and easier" than trapping a nuisance animals or building a fence.
(Image credit: Rob Carr/AP)
Google Street View will be taking stock of more than streets, neighborhoods, and houses in the next month or so. Beginning in July, two Google Street View cars will be tasked with monitoring the air quality in London.
The irritating "plink, plink" sounds of a dripping tap has caused many a sleepless night. But now Cambridge University has discovered what causes it, and how to stop it. Using ultra-high-speed cameras and audio capture techniques, researchers found the noise is produced by the movement of a small bubble of air trapped beneath the water’s surface. The bubble forces the water surface itself to vibrate, creating the sound as it hits an empty, or water-filled sink below. However changing the surface tension of the water that the drops are falling onto by adding washing up liquid causes the sound to vanish. “A lot of work has been done on the physical mechanics of a dripping tap, but not very much has been done on the sound,” said Dr Anurag Agarwal of Cambridge’s Department of Engineering, who led the research. “But thanks to modern video and audio technology, we can finally find out exactly where the sound is coming from, which may help us to stop it.” Ultra slow speed cameras and specialist audio recorders were able to pick out the exact moment the sound is produce as a drop hits the surface Credit: University of Cambridge Dr Agarwal decided to investigate the problem after while visiting a friend’s house who had a leak in his roof. “While I was being kept awake by the sound of water falling into a bucket placed underneath the leak, I started thinking about this problem,” he said. “The next day I discussed it with my friend and another visiting academic, and we were all surprised that no one had actually answered the question of what causes the sound.” The earliest photographs of drop impacts were published in 1908, and the fluid mechanics of a water droplet hitting a liquid surface are well-known, but nobody had got to the bottom of the mystery "plink". In their experiment, the Cambridge researchers found that, the initial splash, the formation of the cavity, and the jet of liquid are all effectively silent. The source of the sound is only down to the trapped air bubble. “Using high-speed cameras and high-sensitivity microphones, we were able to directly observe the oscillation of the air bubble for the first time, showing that the air bubble is the key driver for both the underwater sound, and the distinctive airborne ‘plink’ sound,” said doctoral student Sam Phillips. “However, the airborne sound is not simply the underwater sound field spreading to the surface, as had been previously thought.” According to the researchers, the results could also used to develop more efficient ways to measure rainfall. The research was published in the journal Scientific Reports.
Space is a chilly place, but scientists aboard the International Space Station are about to make it just a little bit colder — temporarily, at least. The crew is about to power up a small device called the Cold Atom Laboratory to plunge atoms into temperatures close to absolute zero.
As NBC Mach reports, the experiments will focus on the movements of particles at temperatures that are just barely above absolute zero — the theoretical temperature in which all movement stops — in order to observe some of the quirks of quantum mechanics. If you've ever even casually looked into research based on quantum mechanics you already know that things are about to get weird.
For an example of just how bizarre things can get in the world of quantum physics you only need to look at the launch of a Chinese satellite from early in 2017. The satellite used a strange quirk known as quantum entanglement to send an "unhackable" message nearly 750 miles to Earth.
Quantum entanglement allows two particles called "twins" to behave in unison even though they are separated by incredibly long distances. Any kind of interaction with one of the particles will result in the other particle reacting in the same manner, almost as though both the particles are actually one, existing in two places at the same time. It's some seriously mind-boggling stuff, but it's totally real, and scientists are eager to learn more about it.
By cooling particles to incredibly low temperatures, scientists have a better opportunity to observe the behavior of these kinds of particles. The low-gravity environment of the space station makes it an ideal place for this kind of testing, and will give researchers more time to observe the chilled particle clouds before they break down.
The work will actually be conducted by scientists here on Earth, and the tiny laboratory won't require any assistance from the crew of the space station. The remote experiments can be performed for nearly seven hours per day, which will give researches plenty of time to try to untangle the mysteries of the universe.
Jeanette Epps can easily be seen as a poster woman for success. Even though that’s something she never set out to become. Not only has she achieved prestige as a former CIA officer and now as a NASA astronaut, she has also navigated her career against all the odds as an African-American woman in industries…
The photographer Jackie Molloy followed Tanner and David for a year and a half, during which time she took some 20,000 pictures.
SACRAMENTO, Calif. (AP) — A cat-sized, weasel-like animal whose habitat in forests along California's northern coast is under threat from marijuana cultivation should receive endangered species status, state fish and wildlife officials said.
The number of people taken into custody at the southern U.S. border with Mexico has been decreasing since 2000. Economists say the reasons people choose to cross the border illegally are changing.
(Image credit: Vanessa Qian and Katie Park/NPR)
Allison Barrie has the first look at the new Milrem Robotics THeMIS, a smart robot that can stealthily approach an enemy tank, and destroy it. The ground drone will be adapted with a special turret from MBDA called IMPACT, and armed with powerful missiles, designed to obliterate enemy tanks.
Rubies and sapphires are made of the same stuff, but trace elements alter their appearances.
He helped develop two technologies that allowed people who could not use a mouse to communicate with a computer, and thus with the world.
An entirely new but long-extinct ape species has been discovered in an ancient tomb in central China. The skull and jaw of the never-before-seen gibbon were found in Shaanxi province inside a royal burial chamber that was built some 2,300 years ago. The previously unknown genus and species of gibbon, which researchers have named Junzi imperialis, may be the first ape to have become extinct due to humans, according to a new study published in the journal Science on Friday.
Company so intertwined with Britain’s £30bn aerospace industry moving would not be easy
Downing St ‘listening’ to aerospace group after no-deal assessment