Because all clades are represented in the southern hemisphere but many not in the northern hemisphere, it is natural to conjecture that there is a common southern origin to them.

Because of Finland's northern location, winter is the longest season.

Because of its northern latitude, daylight extends 17 hours in midsummer, to only around 7 hours in midwinter.

Because most Mandarin dialects are found in the north, the group is also referred to, particularly among Chinese speakers, as the " northern dialect ( s )" ().

Because of the landlocked, hilly terrain common plant foods in Massachusetts are similar to those of interior northern New England-including potatoes, maple syrup, and wild blueberries.

Because of their rugged topography and the rigours of the climate, the northern highlands and the Himalayas to the east have been formidable barriers to movement into Pakistan throughout history.

Because the territorial boundary line between the U. S. and Canada ran through the middle of Lake Erie and then up the Detroit River, combined with the prevailing belief regarding the location of the southern tip of Lake Michigan, the framers of the 1802 Ohio Constitution believed it was the intent of Congress that Ohio's northern boundary should certainly be north of the mouth of the Maumee River, and possibly even of the Detroit River.

Because of their popularity in northern China, stick-handled woks are often referred to as " pao woks " or " Peking pans ".

Because the Fugitive Slave Law had made the northern United States more dangerous for escaped slaves, many began migrating further north to Canada.

Because of the increase in wealth of the trading cities of northern Italy, there occurred a revival in the study of the Justinian Code.

Because of the need for maximum cooling of the water vapor to produce these clouds, their distribution tends to be restricted to polar regions of the Earth during the respective summer seasons in the northern and southern hemispheres.

Because of various factors – the difficulty of crossing the Yellow River, the increased development of an alternative sea route for grain-ships, and the opening of the Tianjin-Pukou Railway and the Beijing-Hankou Railway – the canal languished and for decades the northern and southern parts remained separate.

Because the Kotsoteka and Yamparika lived in the northern part of the Comancheria they were called Northern Comanches.

Because of their prolific and predatory nature, laws have been enacted in some places to help stop the spread of northern pike outside of their native range.

Because Pinal County is located between Arizona's two largest metropolitan regions, Phoenix and Tucson, suburban growth southward from greater Phoenix has begun to spread into the northern parts of the county ; similarly, growth northward from Tucson is spreading into the southern portions of the county.

Because it falls near the equinox, it is associated in the northern hemisphere with the beginning of autumn and the shortening of days.

Because of a sandbank, the northern one is very narrow and shallow, 100 m wide and just 1 m deep in places, impassable to large boats.

Because these books deal with farm life in northern Minnesota, they reflect Weaver's background.

Because Summit Lake is located on a divide, part of its flow exits from the northern end of the lake through Cedar Swamp.

Because of disputes between Pennsylvania and Connecticut over the area of land that is now northern Pennsylvania, the land deed issued to Clark was deemed invalid by the Luzerne County land grant office.

Because it is a prominent landfall on the route from northern Europe to the Mediterranean, several nearby battles are named the " Battle of Cape Finisterre ".

Because of a sewer at the northern end and the District Railway to the south it was decided to build the subway for single-deck trams only.

Because of its access to the river Vorma and the lake Mjøsa has long provided a thoroughfare to northern parts of inland Norway.

Because of its northern latitude, UNBC is a member of the University of the Arctic.

Because Messier compiled his catalog from a northern latitude, not all of the Messier objects are visible from the southern hemisphere.

Because SWNTs are p-FETs when exposed to oxygen and n-FETs otherwise, it is possible to protect half of an SWNT from oxygen exposure, while exposing the other half to oxygen.

Because the German economy could not produce adequate numbers of their half track APC, barely a quarter or a third of the infantry in Panzer or Panzergrenadier divisions was mechanized, except in a few favored formations.

Because at least half the population of atoms must be excited from the ground state to obtain a population inversion, the laser medium must be very strongly pumped.

Because of diversion of the Amu Darya and Syr Darya for cotton cultivation and other purposes, what once was the world's fourth largest inland sea has shrunk in the past thirty years to only about one-third of its 1960 volume and less than half its 1960 geographical size.

Because African countries face some of the most severe poverty and underdevelopment, and because 39 of those countries are the IDA's poorest member states, the association allocates approximately half of the IDA's resources toward financing projects in those countries.

Because Rousseau was the preferred philosopher of the radical Jacobins of the French Revolution, he, above all, became tarred with the accusation of promoting the notion of the " noble savage ", especially during the polemics about Imperialism and scientific racism in the last half of the 19th century.

Because twisted pair is a balanced format, half the loading coil must be inserted in each leg of the pair to maintain the balance.

Because technetium is radioactive, with half life much less than the age of the star, its abundance must reflect its recent creation within that star.

Because of social, political, and academic changes brought on by decolonization in the second half of the 20th century, creole languages have experienced revivals in the past few decades.

Because only one half of the input waveform reaches the output, mean voltage is lower.

Because of Mobutu's poor human rights record, the Carter Administration put some distance between itself and the Kinshasa government ; even so, Zaire received nearly half the foreign aid Carter allocated sub-Saharan Africa.

Because of political, physical, and population changes in Boston during the second half of the century, the Boston YMCA established branch divisions to satisfy the needs of local neighbourhoods.

Because of its fivefold symmetry, the pentaflexagon cannot be folded in half.

Because White gets the next move after Black places the handicap stones, a nominal handicap of n stones is therefore in reality half a stone less than n.

Because of the relatively late emergence of theatre directing as a performing arts profession when compared to for instance acting or musicianship, a rise of professional vocational training programmes in directing can be seen mostly in the second half of the 20th century.

Because Guntram was lord of half of Marseille, the district of Provence became a centre of a brief dispute between the two.

Because of contracts with the Army, the professional, scientific and technical services sector is unusually large, but nearly half of all jobs in Sierra Vista are in the government sector.

Because Loyalton is Sierra County's most populous municipality and its only incorporated city, generally half of the meetings of the county's board of supervisors are held in Downieville ( the county seat ) and the other half are held in Loyalton.

Because of Dublin's location as a midpoint between Savannah and Atlanta, the town in recent decades became home to a small assortment of industrial distribution centers, which complemented various industries — textiles, furniture, and paper, among others — that had already established themselves there in the second half of the 20th century.

Because the village is so small, its fate and governance are already intertwined with Wells College, which owns half the land in the village.

Because Y chromosomes are smaller than X chromosomes, sons inherit a slightly smaller proportion of the genome from their fathers — half of the autosomal DNA, plus a Y chromosome ) than daughters ( half of the autosomal DNA, plus one X chromosome — which is in turn slightly smaller than the proportion that children of either gender inherit from their mothers — half of the autosomal DNA, plus one X chromosome, plus all mitochondrial DNA ).