It is merely required they have capable and compatible receiver systems operational ; However, this is a variable humans cannot accurately estimate without actually making first contact with an intelligent extraterrestrial species.

However, since to date no extraterrestrial life has been confirmed, both theories still suffer from lack of information and too many unidentified variables.

However, these views have been disputed by, among others, the late Carl Sagan, who speculated that any technologically advanced extraterrestrial civilization would be advanced ethically as well, and would not be aggressive, and that humanity would, due to the extraterrestrial civilization's technological prowess, reciprocate this non-aggression.

However the abundance of Life on Earth makes the habitable zones of exoplanetary systems of particular interest to exobiologists and the Search for extraterrestrial intelligence.

In April 2010, GEIPAN statistics stated that 23 % of all cases were of Type D. However, Jean-Jacques Velasco, the head of SEPRA from 1983 to 2004, wrote a book in 2004 noting that 13. 5 % of the 5, 800 cases studied by SEPRA were dismissed without any rational explanation, and stated that UFOs are extraterrestrial in origin.

However, unlike earlier speculation of extraterrestrial life, interest in the ETH was also bolstered by many unexplained sightings investigated by the U. S. government and governments of other countries, as well as private civilian groups, such as NICAP and APRO.

However, even before Wells, there was a sudden upsurge in reports in " Mystery airships " in the U. S. UFO historians Jerome Clark and David M. Jacobs note that extraterrestrial visitation, particularly from Mars, was sometimes proposed to explain these mystery airship waves.

However, when no aircraft emerged that seemed to account for what he had seen, Arnold quickly considered the possibility of the objects being extraterrestrial.

However, as Gogol later learned, the psychologist was an extraterrestrial, and the hypnosis unlocks Gogol's innate superhuman potential.

However, the interpretation is controversial and other authors have disputed its extraterrestrial origin.

However, he assists the pair in defeating the Slitheen, a family of extraterrestrial criminals ; using his computer hacking skills, he commandeers a military harpoon missile which he targets at 10 Downing Street to kill the Slitheen.

However, prior to this final report, Sign officially argued that UFOs were likely of extraterrestrial origin, and most of the project's personnel came to favor the extraterrestrial hypothesis before this opinion was rejected and Sign was dissolved and replaced with Project Grudge.

However, UFO historian Wendy Connors claimed, which did not explicitly mention extraterrestrial ideas but strongly hinted at them, even citing the works of Charles Fort to argue that unusual objects had been flying in the earth's skies for decades before the Arnold encounter.

However, their later efforts moved to defence against the attacks of negative extraterrestrial beings, called saurians or lizard men ( in Czech: ještírci ).

However, the earliest known civilizations had codes of law, containing both civil and penal rules mixed together, though not always in recorded form.

However, both the serpent and the spirit serve as jealous guardians of the graves of kings or ancient civilizations.

However, no incontrovertible signs of such civilizations have been detected.

However, many of the deities depicted are common to the various civilizations and their worship survived over long periods of time.

However, the network could maintain some broadcast nodes in hopes of making contact with new civilizations.

However, despite the occurrence of vampire-like creatures in these ancient civilizations, the folklore for the entity we know today as the vampire originates almost exclusively from early-18th-century southeastern Europe, when verbal traditions of many ethnic groups of the region were recorded and published.

However, in the original Pierre Boulle novel and the 2001 film, both of the same name, the astronauts find civilizations of apes on another planet, but suffer a rude shock upon returning to Earth, finding it besieged by apes.

However, due to the planet's extreme isolation and very limited and short contact with other civilizations it is not difficult to understand why the authorities on Athos have not heard of the technology yet.

However, the Jedi Council is unaware that Count Dooku has fallen under the control of Darth Sidious, and is secretly his new apprentice Darth Tyranus, organizing a separatist coalition of planets and civilizations with the intention of seceding from the Republic.

However from the 1970s, numerous geoglyphs have been discovered on deforested land in the Amazon rainforest, leading to claims about Pre-Columbian civilizations.

However, this chronology applies to other pre-Columbian Mesoamerican civilizations as well.

However, the failings of past fallen civilizations are remembered and personified as an anti-trinity of evil gods ( the " three Rogues "): Dobeis, god of money and greed ; Pill, god of theft and violence ; and Machna, god of science and soulless machinery.

However, highly-developed civilizations flourished at various times and places, such as in the Andes and Mesoamerica.

However, the chaotic nature of human expansion into space has resulted in two Great Checks: a powerful alien intelligence known as Lord Thezmothete, who prevents humans and other species from exploiting pre-spaceflight civilizations ; and the emergence of the Law Machines, intelligent robots that enforce the law in all places.

However, the new civilizations were generally well received.

However, over the course of the last century, the field has expanded to include discussions of the elaborate mosaic of cultures that produced the civilizations of Ancient Greece and Rome.

However, the achievements of the previous Persian civilizations were not lost, but were to a great extent absorbed by the new Islamic polity.

However, at the same time, Spanish and Portuguese discoveries of the Americas, Asia and Africa broadened contact with other cultures and civilizations.

However, archaeological testimony also supports that they were among the first peoples on the continent to produce stone settlement civilizations.

However, inevitable miscegenation led to the ' downfall of civilizations '.

However, it " omitted the laws of repulusion and attraction, which were at the heart of Gobineau's account of the role of race-mixing in the rise and fall of civilizations ".

However, all civilizations initially have access to the Surface World, and, as the game progresses, acquire access to all of the Worlds.

However, Amarinth, who has ties to both civilizations, wishes to try to find a way to use her power to save everyone.

However, there remain elements of fascination with lost continents and lost civilizations, especially as popularized by 19th century science fiction and speculative fiction by authors such as Jules Verne, Edward Bulwer-Lytton, and H. Rider Haggard and the more recent pseudoscientific nonfiction of authors such as Zecharia Sitchin and Graham Hancock.

However, if their United States income is not subject to the withholding of tax on wages, their returns are due June 15, 1962, if they use a calendar year, or the 15th day of the 6th month after the close of their fiscal year.

However, whether you arrange to have a European or American model, if you rent a car with the proper seating capacity in relation to the number of people in your party, your transportation expense will average very close to $10.00 per day per passenger.

However, if these procedures are applied more often, conditioned emotional responses are temporarily abolished.

However, if there is no additional complex of singular lines, the order of the image regulus of a pencil is precisely Af.

However, if Federal funds are used, it would be entirely appropriate to train workers for jobs which could be obtained elsewhere as well as for jobs in the area of chronic unemployment.

However, this difficulty is not too serious if it is realized that a surveying team can establish a true north base line with a few days' work.

However, the teacher can only go so far if the attitude of the community and the family is anti-intellectual.

However, if the child has been constantly surrounded, during nursery and early school age, by peer groups ; ;

However, it was virtually impossible to screen the mob outside, even if Bonner had manpower available for the purpose.

However, three of the managers did say that they would agree to attend the proposed meeting if all of the other managers decided to attend.

However, even if the latent demand for demythologization is not nearly as widespread as we are claiming, at least among the cultured elements of the population there tends to be an almost complete indifference to the church and its traditional message of sin and grace.

However, the opposite can also be true-An opponent can turn a positive statement into a bad one, if the speaker uses ambiguity ( intentionally or not ).

However, it was held by the Supreme Court that an affidavit can be used as an evidence only if the Court so orders for sufficient reasons.

However Juhanen ( 1992 ) is skeptical about an affiliation of Japanese to Altaic languages, while Róna-Tas ( 1998: 77 ) remarked that a relationship between Altaic and Japanese, if it ever existed, must be more remote than the relationship of any two of the Indo-European languages.

However Abdul is a common Arabic prefix meaning " Servant of the " and " Al " is Arabic for " the ", and if " hazra " means " he prohibited ", " he fenced in " or " Great Lord ", then the name would mean " Servant of the Prohibited ", " Servant of the Fenced in ", or " Servant of the Great Lord " which would make sense considering his role, even if it is not a proper Arabic name.

However, if the steel is cooled quickly the carbon atoms will not have time to precipitate.

However, if the excited atom has been previously ionized, in particular if one of its inner shell electrons has been removed, a phenomenon known as the Auger effect may take place where the quantity of energy is transferred to one of the bound electrons causing it to go into the continuum.

However, there are certain limitations: they may not administer the sacraments and related functions whose celebration is reserved to bishops, priests, deacons, or seminarians ( the male clergy ), namely, Holy Orders ( they may make provision for an ordained cleric to help train and to admit some of their members, if needed, as altar servers, Eucharistic ministers, or lectors-the minor ministries which are now open to the non-ordained ).

However, if one now writes down the Hamiltonian

However, this is not required ; endothermic reactions can proceed spontaneously if the TΔS term is large enough.

However, if we look for the peoples in the region from the upper Main in the north, south to the Danube and east to the Czech Republic where the Quadi and Marcomanni were located, Ptolemy does not give any tribes.

However we are told by Longinus that Ammonius wrote nothing, and if Ammonius was the principal influence on Plotinus, then it is unlikely that Ammonius would have been a Christian.