There are more than 450 artificial caves excavated from sandstone beneath the streets and buildings of Nottingham, England—including, legendarily, the old dungeon that once held Robin Hood. Not all of these caves are known even today, let alone mapped or studied. Read more…
Visit link:
Laser-Scanning Hundreds of Artificial Caves Beneath Nottingham
oclHashcat-plus is a “password-recovery” tool that chews through 8-million guesses a second. It optimizes its guesses by trying phrases from “the Bible, common literature, and in online discussions, ” and by formulating characters into websites’ required “password-construction protocols.” One security researcher cracked the passphrase “Ph’nglui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn1, ” a phrase from an H.P.
Taken from:
Password-cracking software runs at 8 million guesses per second
[ Video Link ] Collin Cunningham makes excellent educational videos about electronics. Here’s his latest one, about capacitors. (Via Make )
See the original article here:
What is a capacitor?