![ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate](https://pbs.twimg.com/media/FILakk9WYAMn6lQ.jpg)
ToughSF on Twitter: "The 'nuclear manhole cover to orbit' was based on a single frame captured during the Pascal-B test of Operation Plumbbob. It was estimated that the 900 kg steel plate
![PRESS RELEASE | “4.543 billion. The matter of matter” exhibition at CAPC musée d'art contemporain de Bordeaux, June 29, 2017–January 7, 2018 PRESS RELEASE | “4.543 billion. The matter of matter” exhibition at CAPC musée d'art contemporain de Bordeaux, June 29, 2017–January 7, 2018](https://www.lttds.org/assets/PR_4.543_files/Xavier-Ribas.jpg)
PRESS RELEASE | “4.543 billion. The matter of matter” exhibition at CAPC musée d'art contemporain de Bordeaux, June 29, 2017–January 7, 2018
![The fastest man-made object is a manhole cover that was blasted into space by an underground nuclear test The fastest man-made object is a manhole cover that was blasted into space by an underground nuclear test](https://cdn.zmescience.com/wp-content/uploads/2021/01/atomic_test-357x450-1.jpg)
The fastest man-made object is a manhole cover that was blasted into space by an underground nuclear test
![TIL during Operation Plumbbob's Pascal-B test, a steel plate was launched into the air at about 56 km/s, 5 times the speed of Earth's escape velocity, by a nuclear bomb : r/todayilearned TIL during Operation Plumbbob's Pascal-B test, a steel plate was launched into the air at about 56 km/s, 5 times the speed of Earth's escape velocity, by a nuclear bomb : r/todayilearned](https://external-preview.redd.it/6sTBd2kx1CaPiOwDzzNpLfUbxzAzsv7Q-LWfxTK297g.jpg?auto=webp&s=ea96a979035db0f238154ec2dabbe35f663cfdae)