Elusive intermediate mass black holes may hold clues to how their more common supermassive cousins form.
The problem could be particularly bad in rental cars.
Different people respond to cannabis in different ways, making a blood THC level difficult to legislate.
New system uses a supercomputer and crowd-sourced observations to improve short-term world weather predictions.
A cyber attacker could potentially insert a feature that looks like cancer into a scan, or remove it, researchers warn.