The pendulum of an ornate cuckoo clock is captured in motion. Whether a cuckoo clock has a traditional, carved wood design or is of more modern design, no one can deny that cuckoo clocks are a fun way to tell time.
Biologists have demonstrated that 'evolutionary experience' as well as learning protects cichlid fish from the brood parasitism practiced by the African cuckoo catfish.
Science Daily. Wed, 09 May 2018 10:49:51 EDT.