Living dinosaur

Living dinosaurs is a term sometimes used to denote birds, which are the only clade of dinosaurs known to have survived the Cretaceous-Tertiary extinction event.

See:

• Living fossil, an informal term for animals such as crocodiles and tuataras, which are also occasionally called "living dinosaurs" by journalists.
• Origin of birds for information on the evolution of birds from dinosaurs.
• Lazarus taxon is a taxon that disappears from one or more periods of the fossil record, only to appear again later.
• Paleocene dinosaurs, controversial fossils of non-avian dinosaurs which may have survived the Cretaceous-Tertiary extinction.

Pseudoscience

The term is also used for non-avian dinosaurs that are either mythological or claimed to exist today, but the existence of which is unsupported by current scientific research.

See:

• Cryptozoology for popular speculation about dinosaurs surviving into modern times.
  • Mokele-mbembe, a purported living sauropod; sometimes described as a spirit
  • Emela-ntouka, thought by some to be a living ceratopsian
• Creationist perspectives on dinosaurs for creationist beliefs on living dinosaurs, mainly in young earth creationism

To suggest something is "known" is to suggest it is fact. Currently there is no proof that dinosaurs evolved into birds. Repeatedly removing this fact, does not refute this fact.