The Total Eclipse of the Sun ‘forever’* stamps that I ordered, arrived today. I promptly put my fat finger on one to see if the thermochromic ink works as advertised. It does, and the image of the moon reverts back to a ‘total eclipse’ (black blob) soon after one removes the source of heat.
*’Forever valid as standard postage, no matter how much the US Postal Service increase the rates (currently $0.49). Well, OK, but not even our solar system’s sun is ‘forever’. At some fantastical point in time 5.5 billion years out, it will deplete its supply of hydrogen and helium and collapse into a white dwarf.
