The last 32 generators of the controversial dam were switched on at the end of July last year, and the gushing water that resulted could generate about 22,500 megawatts of energy, and even slowed down the Earth's rotation. But there's no reason to panic, Earth's rotation changes frequently.

I recommend you watch the whole video, but if you're anxious and eager to see what I'm referring to, skip to the fourth minute.

Nearly 20% of all electricity in the world comes from hydropower, and Norway has adapted to rely nearly entirely on it. They are the world leader in hydroelectricity production, generating 120 TWh annually. France and Sweden are next highest, each generating ~65 TWh per year.

Researchers discover that bees and flowers communicate using electric fields.

"It turns out flowers have a slight negative charge relative to the air around them. Bumblebees have a charge, too.

The plant's electric field is changed by the proximity of that positively charged bee. And once the bee leaves, the field stays changed for 100 seconds or so. That's long enough for the altered field to serve as a warning for the next bee that buzzes by. She won't stop to investigate a flower that's already been visited." ...

In this video, sand is sprinkled onto a metal plate attached to a speaker, which is then turned up the to bring the whole thing to life in a pulsating, dance of intricate patterns.