tunnel

Then, with the scanning tunneling microscope, they were able to observe quantum chaos in action: finally seeing with their own eyes the pattern of electron orbits within the stadium billiard they created in Velasco's lab.

Alternatively, a faster primordial black hole might leave behind straight tunnels large enough to be visible by a microscope if passing through solid material, including material right here on Earth.

The disaster happened after routine blasting when thousands of gallons of water flooded a tunnel where seven miners were working - three managed to escape.

"As an example of such a toolset, chimpanzees in the Congo region first use a strong stick to dig a deep tunnel through hard soil to reach an underground termite nest," explains Gunasekaram.

That was followed by an invasion of South Lebanon and the wholesale destruction of Lebanese border villages as well as Hezbollah’s tunnel network.