Two species are described in the literature: A. ramidus, which lived about 4. 4 million years ago during the early Pliocene, and A. kadabba, dated to approximately 5. 6 million years ago ( late Miocene ).

Two Bacillus species are considered medically significant: B. anthracis, which causes anthrax, and B. cereus, which causes a foodborne illness similar to that of Staphylococcus.

* Two species of Malagasy Hippopotamus

Two species of hamster belonging to the genus Phodopus, Campbell's dwarf hamster ( Phodopus campbelli ) and the Djungarian hamster ( Phodopus sungorus ), and two of the genus Cricetulus, the Chinese striped hamster ( Cricetulus barabensis ) and the Chinese hamster ( Cricetulus griseus ) have a dark stripe down their heads to their tails.

Two of the three sampled species within Cricetulus represent the earliest split.

Two dwarf species, named Orcinus nanus and Orcinus glacialis, were described during the 1980s by Soviet researchers, but most cetacean researchers are skeptical about their status, and linking these directly to the types described below is difficult.

Two of his works, the first edition of the Species Plantarum ( 1753 ) for plants and the tenth edition of the Systema Naturae ( 1758 ), are accepted as among the starting points of nomenclature ; his binomials ( names for species ) and his generic names take priority over those of others.

Two kinds of lizards, the Mourning Gecko ( Lepidodactylus lugubris ) and Snake-eyed Skink ( Ablepharus boutonii ) are present on Malden, together with brown libellulid dragonfly and large colonies of Sooty Terns and other migratory seabirds ( nineteen species in all ).

Two examples are kamacite and taenite, which are found in iron meteorites ; these species differ by the amount of Ni in the alloy ; kamacite has less than 5 – 7 % nickel and it's a variety of native iron, whereas the nickel content of taenite ranges from 7 – 37 %.

* Two new fossil penguin species found in Peru

Two planarian species have been used successfully in the Philippines, Indonesia, Hawaii, New Guinea, and Guam to control populations of the imported giant African snail Achatina fulica, which was displacing native snails.

Two water molecules are oxidized by four successive charge-separation reactions by photosystem II to yield a molecule of diatomic oxygen and four hydrogen ions ; the electron yielded in each step is transferred to a redox-active tyrosine residue that then reduces the photoxidized paired-chlorophyll a species called P680 that serves as the primary ( light-driven ) electron donor in the photosystem II reaction center.

Two species of Pteranodon are traditionally recognized as valid: Pteranodon longiceps, the type species, and Pteranodon sternbergi.

Two species, P. orogensis and P. orientalis, are not pteranodontids and have been renamed Bennettazhia oregonensis and Bogolubovia orientalis respectively.

Two endangered species of birds are found here: the California least tern and the California clapper rail.

Two categories are at the species level ; two, at the individual level.

* Two different species of three-spined sticklebacks in each of five different lakes

Two uteri usually form initially in a female fetus, and in placental mammals they may partially or completely fuse into a single uterus depending on the species.

Two species are currently recognized, although others have been assigned in the past.

Two other species of small turtles are the American mud turtles and musk turtles that live in an area that ranges from Canada to South America.

Two species of Hippopotamus, the European Hippopotamus ( H. antiquus ) and H. gorgops ranged throughout continental Europe and the British Isles.

Two other species, Bdellovibrio starrii and Bdellovibrio stolpii, have been moved to a separate genus Bacteriovorax.

Two submarines of the United States Navy have been named USS Tang, after the tang, or surgeonfish, especially of the several West Indian species.

( 1984 ) Two new species of Acanthocephalan Parasites of marine fishes from Bay of Bengal off Purri coast Orissa.

* Charles Dickens used Selkirk as a simile in Chapter Two of The Pickwick Papers: " Colonel Builder and Sir Thomas Clubber exchanged snuff – boxes, and looked very much like a pair of Alexander Selkirks — ' Monarchs of all they surveyed.

Two districts — Eanes and Round Rock — are rated " gold medal ", the highest of the magazine's cost-performance categories.

Grant then made a few more albums before dropping out of college to pursue a career in music — Never Alone, followed by a pair of live albums in 1981 ( In Concert and In Concert Volume Two ), both backed by an augmented edition of the DeGarmo & Key band.

* Two Fairy Tales — Henrik and Anne Egerman ( cut for time )

Two political parties grew out of conflicts between the followers of Bolívar and Santander and their political visions — the Conservatives and the Liberals – and have since dominated Colombian politics.

Two paintings ( both dated 1565 ) by Pieter Bruegel the Elder depict Dutch peasants curling — Scotland and the Low Countries had strong trading and cultural links during this period, which is also evident in the history of golf.

Two contemporaries -- Thomas Brattle and Robert Calef — place him at executions ( see below ).

Posthumously, two albums of demo recordings from 1974 to 1977 — Hardcore Devo: Volume One ( 1990 ) and Hardcore Devo: Volume Two ( 1991 )— were released on Rykodisc, as well as an album of early live recordings, DEVO Live: The Mongoloid Years.

The completed films included the seven-episode Why We Fight series — consisting of Prelude to War ( 1942 ), The Nazis Strike ( 1942 ), Divide and Conquer ( 1943 ), The Battle of Britain ( 1943 ), The Battle of Russia ( 1943 ), The Battle of China ( 1944 ), War Comes to America ( 1945 ) – plus Know Your Enemy: Japan ( 1945 ), Tunisian Victory ( 1945 ), and Two Down and One to Go ( 1945 ) that do not bear the Why We Fight banner ; as well as the African-American related, The Negro Soldier ( 1944 ).

Two main types of filter media are employed in the chemical laboratory — surface filter, a solid sieve which traps the solid particles, with or without the aid of filter paper ( e. g. Büchner funnel, Belt filter, Rotary vacuum-drum filter, Cross-flow filters, Screen filter ), and a depth filter, a bed of granular material which retains the solid particles as it passes ( e. g. sand filter ).

Two manuscripts are known to have existed, both dated to the late 16th century and written respectively in Italian and in Spanish — although the Spanish manuscript is now lost, its text surviving only in a partial 18th-century transcript.

Two rural-style comedians, already well known in their native Canada, gained their first major U. S. exposure — Gordie Tapp and Don Harron ( whose KORN Radio character, newscaster Charlie Farquharson, had been a fixture of Canadian television since 1952 and later appeared on The Red Green Show ).

Greenberg hit the only two homers by the Tigers — one in Game Two, where he batted in three runs in a 4 – 1 win ; the other — a two-run job — tied the game in the eighth inning of Game Six, making the score 8 – 8, but the Cubs won that game with a run in the bottom of the 12th.

Two different — yet early — traditions record the site of Hesiod's grave.

Two most common forms of engine cooling are air-cooled and water cooled — most modern engines are water cooled.

Two prefectures — Hokkaidō and Okinawa — are composed entirely of islands.

Two months later, Gaddafi asserted that he wanted his agents to assassinate dissident refugees, even if they were just on pilgrimage in the holy city of Mecca — in August 1984, a Libyan plot in Mecca was thwarted by Saudi Arabian police.

Two rival theories to account for the relationship between change and identity are Perdurantism, which treats the tree as a series of tree-stages, and Endurantism, which maintains that the tree — the same tree — is present at every stage in its history.

Two entities founded in 1962: the Esalen Institute in Big Sur, California and the Findhorn Foundation — an intentional community which continues to operate the Findhorn Ecovillage near Findhorn, Moray, Scotland — played an instrumental role during the early growth period of the New Age movement.