skyscraper

Tourist footage of the 660-ton tuned mass damper in Taipei 101 swaying during tremors from the 2008 Sichuan earthquake. The damper hangs from the 92nd floor.

Footage of British steeplejack Fred Dibnah climbing a chimney overhang at over fifty years old, without a harness. It is a short clip from his steeplejack work.

The Geopolymer Institute presents Joseph Davidovits's theory that the Egyptian pyramids were built from cast artificial limestone, a geopolymer concrete, rather than carved blocks. It demonstrates how few people could make blocks.

An Onion News Network satirical segment about a memorial dedicated to the future victims of a dam that officials know will fail. It is a dark joke about known infrastructure risk and inaction.