“The vast range of sightings are especially surprising given that, just 50 years ago, the Thames was deemed “biologically extinct”: too polluted and filthy for marine life to survive. While whales and porpoises were once common in Thames water, it was generally assumed by 1965 that those times were over for good.”
River Thames ‘back from the dead’ with seals, whales and dolphins
tora42's nonsensne 