Mercury's "Magnetic Tornadoes" and the Big Picture...

Well, it seems that Mercury and Earth aren't so dissimilar after all, at least in terms of their magnetospheric interactions with space. But, I wonder, when does anecdotal evidence cease being anecdotal and...

A Giant Breach in Earth's Magnetic Field

" Dec. 16, 2008: NASA's five THEMIS spacecraft have discovered a breach in Earth's magnetic field ten times larger than anything previously thought to...