A new explanation has been given for the eerie floating orbs of light observed in Hessdalen in Norway. An Italian engineer thinks the valley could be acting as a colossal battery. But a Norwegian physicist is not exactly electrified by the clarity of this answer.
The best weapon in the battle against salmon lice in the Norwegian aquaculture industry has proved to be the use of what are called “cleaner fish”, fish that eat salmon lice. But these fish often die during breeding. Now, researchers have found a way to help the young fish survive.