Clumping of iron filings in the presence of a ball magnet and its magnetic field. The magnetised iron filings align due to the interactions between them, even though the magnetic field itself is continuous. Credit: Lawrence Lawry/Science Photo Library
Hidden Portals in Earth's Magnetic Field
NASA - Hidden Portals in Earth's Magnetic Field Roger wrote about portals in his black book titled, "The Hitchhiker's Guide"
Supermoon tonight, moon set 22nd and moon rise in the morning of the 23rd.
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Stunning work by Saudi artist Ahmed Mater (featured in 'The Hidden Art of Islam') inspired by pilgrims flocking to Mecca. It’s actually a magnet attracting thousands of iron fillings.