The second in this two-part series about the weirdest natural events on the planet features the incredible sea foam which turns part of the Australian coast into what looks like the world's biggest bubble bath. Plus there is a look at the mysterious death of thousands of sea birds on America's west coast, and the otherworldly phenomenon known as milky seas.

Other strange events include thousands of birds falling from the sky in America, causing panic and predictions of the apocalypse among the residents, and the fish that fell from the sky in south London.

And finally there is the story of the truly terrifying holes which open up in the earth's crust and swallow not only buildings, but in the case of a nature reserve in Florida, an entire lake.