Physics riddle: anti-scientists claims Big Bang breakthrough

I amused by the latest great scientific announcement of successfully trapping the first “anti-atom”. “but until recently none could be trapped for long enough to study them”. Well would it be too foolish to suggest that the reason they have not been able to “trap” antimatter because it is a theoretical particle that does not exist in nature. If antimatter did exist it would be immediately annihilated by matter. Gerald Gabrielse, after a 20 year hunt for anti-matter should begin to realise this. If I create a swirl in a river that dissipates almost immediately have I created an anti-river? Or have I just been given a vital clue to the nature of the river?