mining

A two-minute clip of Andreas Antonopoulos explaining why a 51% attack on Bitcoin would not destroy it and what such an attack would cost. It is a succinct take on mining security.

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.

A one-minute clip from a cat cafe in Japan where sleeping cats wake and look around just before an earthquake begins shaking the room.

Tom Scott visits the Strid at Bolton Abbey in Yorkshire, a deceptively narrow stretch of river with dangerous currents. He covers its reputation and the 12th-century legend of the Boy of Egremont.

Amateur footage of a Japanese coast guard boat riding up and over large tsunami waves after the March 2011 Tohoku earthquake. It is short and unedited.

Amateur footage from 2014 of small airplanes being lifted and blown around during a microburst. It is a three-minute clip showing how violent the gusts can be.

Home video of the 11 March 2011 Japan earthquake, filmed as an early warning system detected the P wave and gave seconds of notice before the shaking began. The raw footage shows the warning in action.

SpaceX's official footage of the CRS-6 Falcon 9 first stage landing attempt, in high resolution and slow motion. It shows the descent and touchdown on the drone ship.