Clacker may refer to:
Tetrapods are four-limbed animals constituting the superclass Tetrapoda. It includes extant and extinct amphibians, reptiles, and synapsids. Tetrapods evolved from a group of animals known as the Tetrapodomorpha which, in turn, evolved from ancient sarcopterygian fish around 390 million years ago in the middle Devonian period; their forms were transitional between lobe-finned fishes and the four-limbed tetrapods. The first crown-tetrapods appeared by the very early Carboniferous, 350 million years ago. The specific aquatic ancestors of the tetrapods and the process by which they colonized Earth's land after emerging from water remains unclear. The change from a body plan for breathing and navigating in water to a body plan enabling the animal to move on land is one of the most profound evolutionary changes known. The first tetrapods (stem) or "fishapods" were primarily aquatic. Modern amphibians, which evolved from earlier groups, are generally semiaquatic; the first stage of their lives is as fish-like tadpoles, and later stages are partly terrestrial and partly aquatic. However, most tetrapod species today are amniotes, most of which are terrestrial tetrapods whose branch evolved from earlier tetrapods about 340 million years ago. The key innovation in amniotes over amphibians is the amnion, which enables the eggs to retain their aqueous contents on land, rather than needing to stay in water.
Ichthyostega is an early genus of tetrapodomorphs that lived at the end of the Late Devonian Period. It was one of the first four-limbed vertebrates in the fossil record. Ichthyostega possessed lungs and limbs that helped it navigate through shallow water in swamps. Although Ichthyostega is often labelled a "tetrapod" due to the possession of limbs and fingers, it was more basal ("primitive") than true crown-tetrapods, and could more accurately be referred to as a stegocephalian or stem tetrapod. Likewise, while undoubtedly of amphibian build and habit, it is not considered a true member of the group in the narrow sense, as the first modern amphibians appeared in the Triassic Period. Until finds of other early stegocephalians and closely related fishes in the late 20th century, Ichthyostega stood alone as a transitional fossil between fish and tetrapods, combining fish- and tetrapod-like features. Newer research has shown that it had an unusual anatomy, functioning more akin to a seal than a salamander, as previously assumed.
Jennifer Alice Clack, was an English palaeontologist and evolutionary biologist. She specialised in the early evolution of tetrapods, specifically studying the "fish to tetrapod" transition: the origin, evolutionary development and radiation of early tetrapods and their relatives among the lobe-finned fishes. She is best known for her book Gaining Ground: the Origin and Early Evolution of Tetrapods, published in 2002 and written with the layperson in mind.
Click, Klick and Klik may refer to:
Going Postal is a fantasy novel by British writer Terry Pratchett, the 33rd book in his Discworld series, released in the United Kingdom on 25 September 2004. Unlike most of Pratchett's Discworld novels, Going Postal is divided into chapters, a feature previously seen only in Pratchett's children's books and the Science of Discworld series. These chapters begin with a synopsis of philosophical themes, in a similar manner to some Victorian novels and, notably, to Jules Verne stories. The title refers to both the contents of the novel, as well as to the term 'going postal'.
Clacks may refer to:
Acanthostega is an extinct genus of stem-tetrapod, among the first vertebrate animals to have recognizable limbs. It appeared in the late Devonian period about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and those that were fully capable of coming onto land.
Clackers may refer to:
"Kisses Sweeter than Wine" is a song by The Weavers.
Peter Clack is an Australian drummer – for ten months he was an early member of hard rock band AC/DC. In April 1974 he joined Malcolm Young, Angus Young, Dave Evans and Rob Bailey. He appears in early video footage of AC/DC, the Last Picture Show Theatre video of "Can I Sit Next to You Girl". Clack was a member of the band during the recording of their debut album High Voltage but most of the drum parts were recorded by session man Tony Currenti. Clack continued with AC/DC until January 1975 when he was sacked along with Bailey, Clack's permanent replacement was Phil Rudd.
Kristopher George Clack is a retired American professional basketball player, formerly for the University of Texas. He was drafted by the Boston Celtics in 1999 and later went on to play in the Lega Basket Serie A with Pallacanestro Reggiana and Basket Napoli.
Knocker and knockers may refer to:
Brenda Clack is an American politician from the U.S. state of Michigan. She is a Democrat and was until 2009 a member of the Michigan State House of Representatives. She represented the 34th House District, which is located in Genesee County, and includes much of the city of Flint. She chaired the Families and Children's Services Committee.
Clack can refer to:
Terry Pratchett's Going Postal is a two-part television film adaptation of Going Postal by Terry Pratchett, adapted by Richard Kurti and Bev Doyle and produced by The Mob, which was first broadcast on Sky1, and in high definition on Sky1 HD, at the end of May 2010.
Click and Clack's As the Wrench Turns is an adult animated sitcom produced by Atomic Cartoons and airs on PBS. The series follows the adventures of the brothers Click and Clack from their auto repair shop, Car Talk Plaza. It stars Tom (Click) and Ray Magliozzi (Clack), also known as the Tappet Brothers, from National Public Radio's Car Talk.
Robertson House or Robertson Farm may refer to:
Ralf J. J. Mackenbach is a Dutch plasma physicist, artist and former child star who rose to prominence after winning the Junior Eurovision Song Contest 2009 in Kyiv, Ukraine with the song "Click Clack". He is the first and so far only Dutch winner of the contest.
Thomas Louis Magliozzi and his brother Raymond Francis Magliozzi were the co-hosts of NPR's weekly radio show Car Talk, where they were known as "Click and Clack, the Tappet Brothers". Their show was honored with a Peabody Award in 1992.
The Diana Fountain, also known as Diana of the Treetops, is a fountain and statue of Diana by Estcourt J Clack that stands in Green Park. The park and statue are in the City of Westminster in central London.