Time-lapse of a Perseid meteor over a period of 8,2 min shot close to Landshut, Germany. Every 12s a picture with 10s exposure time was taken. The animation consists of 42 frames. The first image is included twice to make the entrance more visible.
Credit: Thomas Bergwinkl
A warmer Arctic could permanently affect the pattern of the high-altitude polar jet stream, resulting in longer and colder winters over North America and northern Europe, US scientists say. The jet stream, a ribbon of high altitude, high-speed wind in northern latitudes that blows from west to east, is formed when the cold Arctic air clashes with warmer air from further south. The greater the difference in temperature, the faster the jet stream moves. According to Jennifer Francis, a climate expert at Rutgers University, the Arctic air has warmed in recent years as a result of melting polar ice caps, meaning there is now less of a difference in temperatures when it hits air from lower latitudes. “The jet stream is a very fast moving river of air over our head, but over the past two decades the jet stream has weakened. This is something we can measure,” she said Saturday at a meeting of the American Association for the Advancement of Science. As a result, instead of circling the earth in the far north, the jet stream has begun to meander, like a river heading off course. This has brought chilly Arctic weather further south than normal, and warmer temperatures up north. Perhaps most disturbingly, it remains in place for longer periods of time.
Image Credit: NASA Goddard Space Flight Center Scientific Visualization Studio [x]
When public-school students enrolled in Texas’ largest charter program open their biology workbooks, they will read that the fossil record is “sketchy.” That evolution is “dogma” and an “unproved theory” with no experimental basis. They will be told that leading scientists dispute the mechanisms of evolution and the age of the Earth. These are all lies.The more than 17,000 students in the Responsive Education Solutions charter system will learn in their history classes that some residents of the Philippines were “pagans in various levels of civilization.” They’ll read in a history textbook that feminism forced women to turn to the government as a “surrogate husband.”Responsive Ed has a secular veneer and is funded by public money, but it has been connected from its inception to the creationist movement and to far-right fundamentalists who seek to undermine the separation of church and state… [READ MORE]
Could everybody stop falling into the hoax that the Fukushima power plant has contaminated all of the pacific ocean?
Most of the radiation being leaked into the Pacific Ocean is cesium-134, which has a half-life of only two years. Cesium goes in and out of the body like salt, and has had effect on marine populations near Japanese fisheries, however most of the banned sea food is slowly being made acceptable for public consumption.
The real issue now is that some leaks of strontium-90 have been discovered, which is a radioactive substance that stays in the bones of fish and human beings, however much of what has been leaked is cesium.
Now, I am not saying that Fukushima is not an emergency. It is. In fact, that is what is has been classified as by officials. However, we’re not all going to drop dead in five years from eating a pacific fish yet. The Japanese government is spending lots of money to prevent further leakage of radioactive substance.
But the posts you’ve surely seen going around tumblr telling everybody that we’re going to drop dead from consuming milk, fish, vegetables, etc, are totally false! They are taking what is an existing issue and turning it into a crisis.
Whether most of us want to admit it or not, Tumblr is just as bad a source of information as Facebook can be! Don’t trust everything you read, and don’t trust second party news sites! There are people out there who just want to scare you, or make a sensation.