No matter how routine our lives can often seem, there's always more going on in the background of them than we usually realize.
We can live in a city for years without ever meeting the guy in the clown suit with the monkey who hangs out downtown, only to discover that he's basically old news to everybody else.
And it turns out the natural world can have its own equivalents of that guy. As one woman in Australia discovered, we can come across something that doesn't even seem like it belongs on this planet only to learn that we had probably come close to obliviously running into it hundreds of times.