Personally I'm in love with the London Underground.. I think my new favorite station is Earls Court, just because you realize after standing there for 10 minutes just how many Dr. Who fans there are ;)
Sea Otter mums blow air into the fur on their babies to make them super fluffy & bouyant because baby sea otters cannot swim... When mum has to go catch food she will either leave the baby to float in calm water or sometimes tangle the baby in floating seaweed so it won't drift away. clever & doting mothers.