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Let's Lift The Earth!
Organic At Your Own Risk
Searching For Invisible Particles
The BPA Paradox
New CMS Results
In metals like copper and aluminium, conduction electrons move around freely, in the same way as particles in a gas or a liquid. But when impurities are introduced into the metal's crystal lattice, electrons cluster together in a uniform pattern around the point of interference, resembling the ripples that occur>
This idea dates back to the Russians in the 1970s. The surface of Venus is far too hot, and the atmosphere too dense, for Earth life. However, our air is a lifting gas on Venus with about half the lifting power of helium on Eath. A habitat filled with normal air will float high in the dense Venus atmosphere, The atmospheric>
While driving to my doctor's office to get some persistent Toxicodendron diversilobum (that's poison oak) looked at, I listened to NPR. Just as you would expect of me, my radio stations will all have buttons for NPR, country music, whatever station carries Rush Limbaugh, and a variety of others. On NPR I was intrigued>
The van der Waals force, named after Dutch chemist Johannes Diderik van der Waals, is the total forces between molecules not due due to covalent bonds. The famous sticking power of the geckos is thanks to the van der Waals force. Although it was discovered in the 19th century, it is still difficult to quantify>
The Redemption of Gus GrissomThe 50th anniversary of Alan Shepard's flight, the first American in space, was something of a big deal in pop culture.  The 50th anniversary of John Glenn orbiting the Earth, arriving this winter, will likely be a much bigger deal because Sen. Glenn has a lot of name recognition>
What Color Is An Orange ?A question like that, here at science20.com, just has to be a trick question.It is possible, by the application of common sense arguments, to prove to a scientific level of certainty that an orange is absolutely not orange.How don't we see ?Between 41% and 67% of participants, depending on>