background preloader

How to Navigate by the Stars

How to Navigate by the Stars
Explorers have used the stars as a compass for millennia, and if you’re out having adventures at night, you should add the skill to your arsenal. (If nothing else, it’s a killer party trick.) Here’s how to transform the night sky into your personal roadmap. 1) Learn the Big Three According to the Royal Naval Academy, 58 stars are handy for navigation. 2) Find the North Star It’s always within one degree of true north. 3) Shoot for the Moon If you can find Orion’s sword, following its point will show you south. 4) Down Under? The North Star isn’t visible below the equator. 5) Move Like a Star Like the sun, stars skate east to west. 6) Take a Survey Forgot to memorize your constellations? Related:  Cool Shit to KnowSpace Out And Beyond

How the world will look like in 100 years from now Have you ever wondered how the world will be in 100 years? No one can know it from now but highly-regarded scientists (physicists, biologists, sociologists) studying the evolution of the society, human life and the world in general make such kind of predictions based solely on scientific data. According to their publications in scientific journals, see how the world might look like in 100 years from now. Embedded computers According to futurologists Ian Pearson and Patrick Tucker, by 2050 the human body will be embedded with computers, at least in a big part of the population, and by 2075 most of the inhabitants of the developed world will have some kind of chips built in their brains to make them work faster and share thoughts in the form of computer files. Superhuman geniuses Developments in genetic engineering and robotics will create human geniuses who will live forever. Communication by thought transmission The transmission of thought will be taken for granted by scientists.

Top 10 Mysteries Surrounding Ancient Aliens Mysteries Ancient aliens is the idea that aliens visited earth in the past. The idea of ancient aliens is not a new one either. Imagination is one of the most powerful tools in humanity’s evolutionary struggle for survival. As a race, we are hardwired to consider important concepts, such as the creation of life on Earth and the history of people on this planet. The idea of evolution has been used to describe the gradual change of traits that living organisms undergo over time, which is related to the environment, but it doesn’t explain how the biological cells of human’s first ancestor were spawned. The idea surrounding ancient aliens is a basic one. This concept is related to the religious practice of a cargo cult, which can be seen in modern day pre-industrial tribal societies. It has been proposed that, with the current age of the universe and its vast number of stars, if the Earth was typical, extraterrestrial life should be common. Modern Technical Advancement

Constrictor knot History[edit] First called "constrictor knot" in Clifford Ashley's 1944 work The Ashley Book of Knots, this knot likely dates back much further.[5] Although Ashley seemed to imply that he had invented the constrictor knot over 25 years before publishing The Ashley Book of Knots,[1] research indicates that he was not its originator.[6] Ashley's publication of the knot did bring it to wider attention.[7] Although the description is not entirely without ambiguity, the constrictor knot is thought to have appeared under the name "gunner's knot" in the 1866 work The Book of Knots,[8][9] written under the pseudonym Tom Bowling.[10] in relation to the clove hitch, which he illustrated and called the "builder's knot". Tying[edit] The method shown below is the most basic way to tie the knot. Variations[edit] Double constrictor knot[edit] If a stronger and even more secure knot is required an extra riding turn can be added to the basic knot to form a double constrictor knot. Usage[edit] Releasing[edit]

10 Scientific Laws and Theories You Really Should Know" The British physicist and novelist C.P. Snow once said that a nonscientist who didn't know the second law of thermodynamics was like a scientist who had never read Shakespeare [source: Lambert]. Snow's now-famous statement was meant to emphasize both the importance of thermodynamics and the necessity for nonscientists to learn about it. Thermodynamics is the study of how energy works in a system, whether it's an engine or the Earth's core. You can't win.You can't break even.You can't quit the game. Let's unpack these a bit. The second statement -- you can't break even -- means that due to ever-increasing entropy, you can't return to the same energy state. Finally, the third law -- you can't quit the game -- refers to absolute zero, the lowest theoretical temperature possible, measured at zero Kelvin or (minus 273.15 degrees Celsius and minus 459.67 degrees Fahrenheit).

How Humans Are Changing the Planet—in 7 Dramatic GIFs - Rebecca J. Rosen Watch as Las Vegas booms, the Amazon disappears, and Dubai grows out into the sea. Google today released an "interactive timelapse experience" that allows users to explore millions of satellite images captured over the last quarter-century -- 25 years of immense growth and destruction. "We believe this is the most comprehensive picture of our changing planet ever made available to the public," Google said in a statement. The project was built in conjunction with the U.S. "Much like the iconic image of Earth from the Apollo 17 mission--which had a profound effect on many of us--this time-lapse map is not only fascinating to explore," Google Earth's Rebecca Moore writes, "but we also hope it can inform the global community's thinking about how we live on our planet and the policies that will guide us in the future." Here are seven of the most dramatic changes, presented in GIF form.

'Monster' cosmic blast zipped harmlessly by Earth WASHINGTON (AP) — Astronomers call it the monster. It was the biggest and brightest cosmic explosion ever witnessed. Had it been closer, Earth would have been toast. Orbiting telescopes got the fireworks show of a lifetime last spring when they spotted what is known as a gamma ray burst in a far-off galaxy. The only bigger display astronomers know of was the Big Bang — and no one, of course, was around to witness that. "This burst was a once-in-a-century cosmic event," NASA astrophysics chief Paul Hertz said at a news conference Thursday. But because this blast was 3.7 billion light-years away, mankind was spared. A gamma ray burst happens when a massive star dies, collapses into a brand-new black hole, explodes in what's called a supernova and ejects energetic radiation. A planet caught in one of these bursts would lose its atmosphere instantly and would be left a burnt cinder, astronomers say. Scientists might be able to detect warning signs of an impending gamma ray burst. View gallery

52 Plants In The Wild You Can Eat: Edible Greenry Written by Suntactics We all know our vegetables and fruits are safe to eat, but what about other wild edibles? Here are a few common North American goodies that are safe to eat if you find yourself stuck in the wild. For the serious conoisseur, if you get to the end on page 6, there's a great informational documentary video on 100 edible plants: Blackberries: Many wild berries are not safe to eat, it’s best to stay away from them. Dandelions: The easiest to recognize is the dandelion, in the spring they show their bright yellow buds. Asparagus: The vegetable that makes your pee smell funny grows in the wild in most of Europe and parts of North Africa, West Asia, and North America. Elderberries: An elderberry shrub can grow easily grow about 10 feet and yield tons of food, their leaf structure is usually 7 main leaves on a long stretched out stem, the leaves are long and round and the leaves themselves have jagged edges. Gooseberries: Mulberries: Pine: Kudzu:

11 ways you are thoroughly (but interestingly) wrong The folks at Your Logical Fallacy Is have compiled a list of 24 common ways that you and I are often mistaken in the way we think. I have to say that looking through their site is perhaps the most fun I’ve ever had being told how wrong I am. And not just wrong in a certain instance, but consistently and fundamentally flawed in the very way I think. Fun, right? Included at the site is a free, very high-res poster for those of you who may have a reason to hang these as a reminder on the wall. (via MetaFilter) Junk Worth Knowing | You never knew what you were missing.

Dark Plasma Theory Emotional Freedom Technique (EFT) for Headaches Learn Plants Now! » Start Learning Plant Families Here is an overview of five common families of flowering plants. The list includes two of the top three families – the Asteraceae (Aster family) and the Fabaceae (Legume family) – but does not include the Orchidaceae (Orchid family). We’ll look at orchids later – they deserve a session entirely to themselves. The families included here, and the approximate number of species they represent, are: Acanthaceae (Acanthus family) – 2,500 speciesAsteraceae (Aster family) – 23,000 speciesFabaceae (Legume family) – 19,400 speciesRubiaceae (Coffee family) – 10,000 speciesVerbenaceae (Verbena family) – 2,000 species Add up these numbers and you’ll see that these 5 families represent more than 57,000 species of flowering plants, so the chances are good that you’ll be able to find representatives of each of these families no matter where you live. To make the best use of this information, be sure you know the 19 Basic Botanical Terms and are using the Plant Profile Sheet when studying plants.

Gearing up to search for gravity waves In the Newtonian view of the world, binary star systems should remain in a stable orbit in perpetuity, no matter how massive the objects or how close the orbit. But with general relativity, that changes; energy gets carried away from the system in the form of gravity waves, which gradually causes the orbit to decay, ultimately leading to a merger. By observing binary systems of massive objects, we've determined that general relativity gets it right. These systems behave just as general relativity predicts, giving us confidence that the theory is correct. It's not for lack of trying. LIGO's design is very simple. To increase sensitivity, the LIGO project also operated two detectors, one in Louisiana, the other in Washington. If LIGO didn't detect anything, there were two potential explanations. Both of those issues are now being addressed. By 2017, we should be able to detect about 10 events a year.