The only picture ever taken of Concorde flying at Mach 2 (1,350 mph). Taken from an RAF Tornado fighter jet, which only rendezvoused with Concorde for 4 minutes over the Irish Sea: The Tornado was rapidly running out of fuel, struggling to keep up with Concorde at Mach 2.
Obelisk at Luxor, Egypt. One of two that flanked the entry pylons of the great temple of Ammon. The other being absconded with by Europeans in the 19th century and now resituated at the Place de Concord, Paris, France. Both were erected by Rameses II (the "Great") at their original site during the 19th Dynasty.
Henry David Thoreau, fue un escritor, poeta y filósofo estadounidense, de tendencia trascendentalista y origen puritano, autor de Walden y La desobediencia civil. Thoreau fue agrimensor, naturalista, conferenciante y fabricante de lápices.