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TIL: Chris Hadfield (the first Canadian to walk in space and one time commander of the ISS) recorded the first music video in space. Before he handed over command of the ISS in May 2013, he paid tribute to David Bowie by recording his version of Space Oddity.

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via ift.tt

695G7 TIL That the concrete used by the ancient romans has self healing properties, can last thousands of years and can make construction more environmentally sustainable
wLbaW TIL about the X-Seed 4000, the largest building ever with completed construction plans. Standing at 4,000m/4km (13,123ft/2.5mi) tall, it could house 1 million people on its 800 floors. The shape of X-Seed is based off Mount Fugi, and is even 224m (735ft) taller than it.
gZx4 TIL - that an explorer and adventurer went missing in the Amazon in 1925 searching for El Dorado. Since then, around 100 people have died trying to find him, and as recently as 1996 an expedition to find his remains only got out after paying a ransom to their Kalapalo captors.
W7Nl9 TIL: During 7/7, the US Army Band played the UK anthem outside the British/DC embassy in remembrance of the victims. This mirrored the Queen Guards' performing the US anthem outside Buckingham palace on September 13, 2001 in remembrance of the victims of 9/11
PA5e TIL the Indian rebellion of 1857 started because the East India Trading Company was asking its soldiers to bite the seal off their ammo cartridges, which were sealed with pork and beef animal fats (against Muslim and Hindu beliefs).