http://www.spacetimetravel.org/
Related: science5 Really Weird Things About Water Water, good ol' H2O, seems like a pretty simple substance to you and me. But in reality, water - the foundation of life and most common of liquid - is really weird and scientists actually don't completely understand how water works. Here are 5 really weird things about water: 1. Not enough hours in the day? Scientists predict time will stop completely The theory of time running out was devised by researchers from two Spanish universities trying to explain why the universe appeared to be spreading continuously and accelerating. Observations of supernovae, or exploding stars, found the movement of light indicated they were moving faster than those nearer to the centre of the universe. But the scientists claimed the accepted theory of an opposite force to gravity, known as dark energy, was wrong, and said the reality was that the growth of the universe was slowing. Professor Jose Senovilla, Marc Mars and Raul Vera from the University of the Basque Country and the University of Salamanca said the deceleration of time was so gradual, it was imperceptible to humans. Their proposal, published in the journal Physical Review D, claimed dark energy does not exist and that time was winding down to the point when it would finally grind to a halt long after the planet ceased to exist.
Universities with the Best Free Online Courses Free online courses are offered by real schools. Learn which courses are available, what topics they cover and which ones lead to real college credit. Online Courses for Credit All of the schools listed below are well-known universities with a variety of free online course offerings. These classes are typically offered as part of an OpenCourseWare (OCW) project. Materials can be accessed at any time and the coursework is self-directed, though no academic credit is awarded for course completion.
Relativistic Baseball What would happen if you tried to hit a baseball pitched at 90% the speed of light? - Ellen McManis Let’s set aside the question of how we got the baseball moving that fast. We'll suppose it's a normal pitch, except in the instant the pitcher releases the ball, it magically accelerates to 0.9c. Ideas - TREEFINDER My subversive attempts to do something useful. The Rotary Piston Array Machine -- Air-Sea Temperature Difference Engine -- Solarthermal Power Generator The Rotary Stirling Engine The Wave Pump Heat Engine With No Compressor Portable Tent Platform The rotary piston array (RPA) is the possibly most compact and most elegant machine to transform the volumetric change of gas into shaft work and vice versa. It can be used as pneumatic motor, steam engine, gas compressor, vacuum pump and the like, but also as part of new heat or combustion engines which – like the Stirling engine – open new ways to harvest renewable energy.
Blog: Higgs Hysteria You know that a scientific idea has penetrated popular culture when people start making jokes about it. Like the one about the priest who changed his name to Higgs so he could be better at giving mass. Or some that say a gadget for negating the Higgs field would be a weapon of mass destruction. Einstein for Everyone Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D. Norton Published by Nullarbor Press, 500 Fifth Avenue, Pittsburgh, Pennsylvania 15260 with offices in Liberty Ave., Pittsburgh, Pennsylvania, 15222 All Rights Reserved John D.
Richard Feynman videos Videos This page has been recently updated. The Fantastic Mr Feynman - BBC documentary, May 2013 Feynman's 1984 lecture on Tiny Machines (79 minutes) Richard Phillips Feynman - The Last Journey Of A Genius (full version, 54 minutes) The Challenger - BBC movie (full version, 89 minutes) Invar® & Steel Alloys Lists of Nobel Prizes and Laureates Invar® & Steel Alloys Play the Invar & Steel Alloys Game Breakthrough in physics may lead to new view of magnetism An artistic representation of a ‘polaron’ – a new quantum state, or a ‘quasiparticle’. The potassium atom in the middle (blue) repels the smaller lithium atoms (yellow). This creates a complex state, which physically can be best described as a quasiparticle (Illustration: Harald Ritsch) Ferromagnetism is a phenomenon we encounter everywhere in nature. It’s the form of magnetism which most people are familiar with, as exhibited in horseshoe magnets, refrigerator magnets and in a wide range of technologies such as hard drives and medical equipment.
50 Really Cool Online Tools for Science Teachers A 21st-century education revolves around the Internet for everything from collaboration, tools, lessons, and even earning degrees online. If you are looking for ways to integrate online learning into your science class or science degree programs, then take a look at these cool online tools that are just perfect for both teachers and students. Science Tools to Use with Students