A mainstream publication probably wouldn't do this, but I can imagine Slashdot, Google, and various tech/sciece/health blogs doing this as an April Fool's joke. If you don't have a blog, do it to a friend: "Omg! Did you hear that scientists have figured out how to plot what the night sky would look like from any point on earth at any point at time and with any light pollution level???? This will change EVERYTHING!"

Preferably, the web sites would make the "new"s about something of practical use, so that it looks like a new breakthrough. Some ideas:

-Scientists have discovered that simple "Turing" machines can do all the computations of modern computers! -Mathematicians have discovered that prime numbers can be used to provide military-grade encryption of messages! -Engineers have discovered a way to make heavy objects support their own weight *merely from the pressure of the air flowining around them*!