This is a story that starts out weird, and gets a whole lot weirder.

Five years ago, I threw away a hard drive. An utterly generic 250GB portable hard drive, already a few years old, with a couple of dings and scratches in its shell and with the beginnings of an audible click that would have eventually killed it.

It had a data file containing 1400 Bitcoin on it. No big deal, at the time. Today, those few kilobytes are worth more than four million dollars.

Homo sapiens is a very moody species. Even though sadness and bad moods have always been part of the human experience, we now live in an age that ignores or devalues these feelings. More's the pity. Here's why bad moods are good for you.

When a friend is down, it's natural to try to cheer them up. That may not be what they need most, however. As The School of Life explains, "jollying" your friend along may not be the best way to empathise with them.