However, the current consensus among the scientific community is that the extinction was triggered by the Chicxulub impact event in Central America ( which would have produced a sunlight-blocking dust cloud that killed much of the plant life and reduced global temperature, called an impact winter ).

However, typical daytime VFR minimums for most airspace is 3 statute miles of flight visibility and a cloud distance of 500 ' below, 1, 000 ' above, and 2, 000 ' feet horizontally.

However, the discovery of the object 1996 PW, an asteroid in an orbit more typical of a long-period comet, suggests that the cloud may also contain rocky objects.

The nearest nebula to the Sun where massive stars are being formed is the Orion nebula, away .< ref > However, lower mass star formation is occurring about 400 – 450 light years distant in the ρ Ophiuchi cloud complex.

However, the collapsing cloud will eventually become opaque to its own radiation, and the energy must be removed through some other means.

However, as long as the air remains saturated, the natural force of cohesion that hold the molecules of a substance together acts to keep the cloud from breaking up.

However cirrocumulus stratiformis cirromutatus or cirrostratomutatus can result from sheets or filaments of high cloud taking on a stratocumuliform structure as a result of high altitude convection.

However, satellite data show that cloud optical thickness actually increases with increasing temperature .< ref name = tselioudis-1992 > Whether the net effect is warming or cooling depends on details such as the type and altitude of the cloud ; details that are difficult to represent in climate models.

However, the cloud of suspicion raised by the intense media focus on the missing intern and the later revelation of the affair led to his loss in his 2002 re-election campaign.

However, he gets to return after saving Bart from a toxic smoke cloud at school and then leaving the police force.

However, he began pondering the question of what the implications would be if there had been a drawing of a mushroom cloud in a magazine from 1932, and he eventually came up with the plot of a time travel story.

However M-band images taken from the MMT Observatory put strong limits on the existence of gas giants within 40 AU of the star and Spitzer Space Telescope imaging suggests that the object Fomalhaut b is more likely to be a dust cloud than a planet.

However, the cloud sheet is not completely uniform, so that separate cloud bases still can be seen.

However, precipitation does not occur at ground level in case of virga and accompanies other cloud types.

However, under exceptional circumstances, a highly ionized Es cloud can propagate band I VHF signals down to approximately.

However, on August 21, 1986, a limnic eruption occurred at Lake Nyos which triggered the sudden release of about 1. 6 million tonnes of CO < sub > 2 </ sub >; this cloud rose at nearly.

However, under exceptional circumstances, a highly ionized Es cloud can propagate band I VHF signals down to approximately.

However if the cloud reaches the tropopause, it may spread against the wind direction, as the convection speed is higher than the ambient wind speed.

However, he left under a cloud, as NCAA sanctions were levied against Kansas in the 1988 – 89 season as a result of recruiting violations that took place during Brown's tenure.

However, if the designator is turned off, the laser spot moved, the laser signal is blocked ( for example by cloud or smoke ), the weapon's accuracy will be greatly reduced.

However, some scholars have recently rehabilitated Grosch's law, looking at the history of cloud computing and claiming that " Grosch was wrong about the cost model of

However, Maunder wrote that the phenomenon moved rapidly from horizon to horizon, which would rule out a noctilucent cloud or upper tangent arc.

However, the classification as a metro or rapid rail can be difficult as both may typically cover a metropolitan area exclusively, run on separate tracks in the centre, and often feature purpose-built rolling stock.

However, his cover was not as a writer or journalist.

However when combined with land mines, snipers, barbed wire, and air cover, crossfire became a difficult tactic to counter in the early 20th century.

However, the band's cover of the Jimi Hendrix classic "' Are You Experienced?

However, expansion has been difficult because mountains cover much of the countryside and limit the land available for cultivation.

However, despite their name, promotional photographs on the cover of their first album wearing " flower power " style clothes that implied associations with " druggy " music and distorted acid rock-style guitars, the band actually had no associations with that style of music.

However, illegal logging has reduced forest cover to less than 10 % of the total land area.

However by 2006, a cover story on Led Zeppelin honored them as " the Heaviest Band of All Time ".

However the country's forest cover, which was around 49 % in 1920, had been fallen to approximately 24 % by 2009.

However, revenue from non-patent-medicine advertisements was too low to cover costs.

However to many Poles today, Silesia ( Śląsk ) is understood to cover all of the area around Katowice, including Zagłębie.

However, under sharia law, women are required to cover all of their bodies except hands and face.

However, he had a tough time securing the rights to Townes Van Zandt's cover of the Rolling Stones ' " Dead Flowers ", which plays over the film's closing credits.

However, from an ecological perspective, this is a falsehood, for several reasons, including: a ) Removing most of the trees in a given area is usually done using large machines which disrupt the soil greatly, and the dramatic diminution of ground cover permits large-scale erosion and avalanches, which further damage the habitat and sometimes endangers infrastructure, roads, and communities.

However, an XHTML document is an XML document, which, while not having an explicit " document character " layer of abstraction, nevertheless relies upon a similar definition of permissible characters that cover most, but not all, of the Unicode / UCS character definitions.

However, it is often correct to split honours ( play the lower of two touching honours ) and to cover a J or 10 when holding Qx and cover a Q when holding the ace.

However, its use is highly exaggerated in wuxia stories and films, in which characters cover tremendous distances in a single stride and at times, fly and circumvent gravity as well.

However, professional editors still have to be paid, and PLoS still relies heavily on donations from foundations to cover the majority of its operating costs ; smaller journals do not often have access to such resources.

However, adequate forest or brush cover must still be provided for populations to grow and thrive.

However, prominent champions of evolution engaged in opposing intelligent design beliefs thought the cover was both sensationalist and damaging to the scientific community.

However, the Italians and Germans evacuated all of their soldiers and much of their heavy equipment across the Strait of Messina to the Italian mainland under the cover of anti-aircraft artillery.

However, extensions to cover ( for example ) subspace clustering have been proposed independently of the DMG.

However, it is impossible for a rock to be larger than space, as space will always adjust itself to cover the space of the rock.

However, many historians believe that Warbeck lied about the story of how he came to be a pretender in order to cover his tracks and hopefully allow himself to escape the death penalty.