Wallpaper Videos See the universe come to life via animations, scientific visualizations, expert commentary, and more. Earth Revealed - Video Series Video Librarian January 1992“Three Stars.”” Earth Revealed is devoted to understanding our home: the planet Earth…”“…this series does present a current and in-depth introduction to geology, and would be excellent for high school and college libraries.”“…recommended for public libraries with larger video collections.”Booklist May 1992“Technical qualities are excellent in these programs, which intriguingly introduce the subject for both students and the interested independent learner.”Video Rating Guide Winter 1993“Five Stars.”“This series is an excellent tool for individuals who wish to learn about geology on their own…or for students who need some clarification and visual reinforcement for courses in geology or earth science.”“…the primary thrust of this series is educational, and it fulfills this purpose admirably.”“Difficult concepts are presented in clear and simple terms and illustrated by footage of actual phenomena as well as drawings and models.”
Christmas Traditions, Christmas History, Christmas Around the World, The Christmas Story and Christmas Fun and Games! - whychristmas?com Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes Introduction to Shark Evolution, Geologic Time and Age Determination Sharks are one of evolution's most enduring success stories. Although they have few hard parts that can survive the insults of geologic time, sharks have left a long and rich fossil record. Some 2,000 to 3,000 species of fossil shark have been described. In contrast, the total cast of the dinosaur dynasty comprises only about 650 to 800 species. The ancestry of sharks dates back more than 200 million years before the earliest known dinosaur. A 'fossil' is any remains, trace, or impression of ancient life, preserved in rock. Shark teeth provide paleontologists an unusual suite of advantages and drawbacks. Cleaned and dried jaws of the closest living ancestor of Hemipristis serra, the Snaggletooth Shark (Hemipristis elongatus). If a fossil tooth is well-preserved, it affords numerous characters that can be used to identify the species (or at least the basic taxonomic group, such as genus, family, or order) to which it belongs. A deformed fossil tooth of Carcharocles megalodon.
Black swallower The black swallower, Chiasmodon niger, is a species of deep sea fish in the family Chiasmodontidae, notable for its ability to swallow fish larger than itself (for which it is sometimes named the "great swallower"). It has a worldwide distribution in tropical and subtropical waters, in the mesopelagic and bathypelagic zones at a depth of 700–2,745 m (2,300–9,000 ft).[1] Description[edit] A small lower spine occurs on the preoperculum. The pectoral fins are long, with 12–15 (usually 13) rays; the pelvic fins are small and contain five rays. Of the two dorsal fins, the first is spiny with 10–12 spines, and the second is longer with one spine and 26–29 soft rays. Feeding[edit] The black swallower feeds on bony fishes, which are swallowed whole. Black swallowers have been found to have swallowed fish so large, they could not be digested before decomposition set in, and the resulting release of gases forced the swallower to the ocean surface. Reproduction[edit] References[edit]
ReefQuest Centre for Shark Research Home Free Keyboards The History of Sound Cards and Computer Game Music | MacGateway Jul 13, 2012 All modern computers have the ability to play high-quality digital sound, thanks to the presence of a dedicated sound card or an audio chip on the motherboard. Today’s computers produce lifelike, realistic audio, enabling us to listen to digital music collections, watch online videos and play action-packed games. Table of Contents 1981: PC Speaker If you had an IBM PC computer or a 100-percent compatible clone between 1981-1988, you were most likely listening to — or cutting the wires of — your computer’s internal speaker. Listen to the PC Speaker Silpheed (1988) Composed by Nobuyuki Aoshima, Mecano Associates, Hibiki Godai, Fumihito Kasatani and Hiromi Ohba. This piece from the Silpheed soundtrack illustrates the technique most composers used when writing music for the PC speaker; the speaker plays the main melody only, and no tricks are used to simulate rhythm or accompaniment. J. Composed by Charles Deenen and Kurt Heiden. Space Racer (1988) Composed by Michel Winogradoff.
21 Terrifying Deep Ocean Creatures Scary Seas: 21 Terrifying Deep Ocean Creatures Article by Marc, filed under Destinations & Sights in the Travel category. The last true frontier on Earth is deep in the ocean. Any expedition to the dark depths is incredibly expensive, yet invariably comes back with a host of newly discovered species that are about as alien to land dwellers as it’s possible to get on this planet. (Images via thedailygreen, seasweetie, wikipedia, uncommondescent, weird-funnythings) The Kiwa is a blind, furry crab that resides 5,000 feet below the surface of the ocean. (Images via thedailygreen, unknownskywalker, xcitefun, fuckyeahstrangecreatures) This marvelous creature looks like a jellyfish, but it’s actually a sea cucumber called the Pink See-through Fantasia. (Images via mongabay, oceancaresolutions, listverse, seaslugforum) This snailfish’s fins look wing-like and majestic, but the only flying it will do is 7,000 feet underwater. (Images via rocketboom, thetruthbehindthescenes, yahoo, whentalking)
40 Pictures of Airplanes Breaking the Sound Barrier Supersonic speed is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects travelling in dry air of a temperature of 20 °C (68 °F) this speed is approximately 343 m/s, 1,125 ft/s, 768 mph or 1,235 km/h. A sonic boom is the sound associated with the shock waves created by an object traveling through the air faster than the speed of sound. Below you will find a gallery of incredibly fast and expensive airplanes breaking the sound barrier and thus travelling at supersonic speeds. Pacific Ocean (Nov. 5, 2006) – An F/A-18F Super Hornet assigned to the “Diamondbacks” of Strike Fighter Squadron One Zero Two (VFA-102) completes a super-sonic flyby as part of an air power demonstration for visitors aboard USS Kitty Hawk (CV 63). Off the coast of Pusan, South Korea, July 7, 1999 — An F/A-18 Hornet assigned to Strike Fighter Squadron One Five One (VFA-151) breaks the sound barrier in the skies over the Pacific Ocean. ATLANTIC OCEAN (April 17, 2008) Capt.
Gödel and the limits of logic June 2006 The man in the photograph on the right looks formal, reserved and somewhat undernourished. His face and his writings are unfamiliar to most, except for a few philosophers and mathematical logicians. He was Kurt Gödel, celebrated for his incompleteness theorems, the implications of which are far-reaching for the foundations of mathematics and computer science. Gödel proved that the mathematical methods in place since the time of Euclid (around 300 BC) were inadequate for discovering all that is true about the natural numbers. Mr Why Born on April 28, 1906, in Brno, Moravia, Gödel was the second of two children of Rudolf and Marianne Gödel, expatriate Germans whose families were associated with the city's textile industry. Indeed, only once during his primary and secondary school career did young Kurt ever receive less than the highest mark in any subject (mathematics!). The reticent genius In 1924 Gödel left his homeland to enrol at the University of Vienna. Moment of impact