When a cyberattack occurs, ethical hackers are called in to be digital detectives. In a certain sense, they are like regular police detectives on TV. They have to search computer systems to find ways an intruder might have come in – a digital door or window left unlocked, perhaps. They look for evidence an attacker left of entry, like an electronic footprint in the dirt. And they try to determine what might have been copied or taken.
A new device mimics the branches and leaves of a cottonwood tree and generates electricity when its artificial leaves sway in the wind.
A new explanation for the origin of Antarctica links two competing theories.