Bilbo Baggins had played Frodo in the BBC radio series 20 years earlier. The movies omit the 17-year gap between Bilbo's 111th birthday and Frodo's departure from the Shire, as a result Bilbo mentions in Rivendell that he was unable to revisit the Lonely Mountain before his retirement. In Peter Jackson's "The Hobbit" film series, a prequel to "The Lord of the Rings", the young Bilbo is portrayed by Martin Freeman while Ian Holm reprises his role as an older Bilbo in "" (2012) and "" (2014). The International Astronomical Union names all colles (small hills) on Saturn's moon Titan after characters
J. R. R. Tolkien the field of taxonomy, over 80 taxa (genera and species) have been given scientific names honouring, or deriving from, characters or other fictional elements from "The Lord of the Rings", "The Hobbit", and other works set in Middle-earth. Several taxa have been named after the character Gollum (also known as Sméagol), as well as for various hobbits, the small humanlike creatures such as Bilbo and Frodo Baggins. Various elves, dwarves, and other creatures that appear in his writings as well as Tolkien himself have been honoured in the names of several species, including the amphipod "Leucothoe tolkieni", and the wasp