The Cambrian sea was a very strange and alien place ... Watch First Animals on The Nature of Things.

In short, it's an amazing place. Here's a list of some of the most mind-boggling things we've already found in the depths of the sea.

From shark eggs to deep sea creatures, long-lost jewellery, and silver rat poison canisters — all sorts of strange things can wash up on our beaches. As people flock to the coast over the ...