If a pair of twins are born on the day the ship leaves, and one goes on the journey while the other stays on Earth, they will meet again when the traveler is 6 years old and the stay-at-home twin is 10 years old.

* If the twins are joined at any part of the body-called conjoined twins, delivery is mostly by caesarean section.

In earlier studies, Stephen O ' Brien, a geneticist, had suggested, " If you do a DNA fingerprint, Asiatic lions actually would look like identical twins ... because they descend from as few as a dozen individuals that was all left at the turn of the 20th century.

If that weren't enough what happens when horrible news invades the twins ' lives?

Biggie did respond to this matter in a similar fashion, rapping in a joint release by himself and Jay-Z in the song " Brooklyn's Finest ", where he says " If Faye have twins, she'd probably have two Pacs.

If several twin crystal parts are aligned by the same twin law they are referred to as multiple or repeated twins.

If these multiple twins are aligned in parallel they are called polysynthetic twins.

If the twins are a male-female pair, the male hormones from the bull calf have the effect of partially masculinising the heifer ( female ), creating a martin heifer or freemartin.

If it happens within 13 to 17 days, conjoined twins develop, if the embryo undergoes

If you were a man '' --

If she, Pamela, were being held responsible for his crimes, then hers must be the final act of expiation.

If someone were to drop a match in here, this place would go up like a haystack ''.

If the other pilots were worried, they did not show it.

If it were the enemy, tactically his position was correct.

If it were not for an old professor who made me read the classics I would have been stymied on what to do, and now I understand why they are classics ; ;

If it were not that I knew who it was I could have mistaken it for my Aunt so well did her clothes fit him.

If an automobile were approaching him, he would know what was required of him, even though he might not be able to act quickly enough.

If there were only darkness, all would be clear.

If there were only the mess, all would be clear ; ;

If these people were denied a voice ( do they have a moral right to a voice??

If we were creating a wholly new society, we could insist that our social, political, economic and philosophic institutions foster rather than hamper man ; ;

If living Jews were unavailable for study, the Bible was at hand.

If his scholarship and formal musicianship were not all they might have been, Mercer demonstrated at an early age that he was gifted with a remarkable ear for rhythm and dialect.

If she were not at home, Mama would see to it that a fresh white rose was there.

If the Stearns were not there, grace would be omitted.

If anything, the conservative Democrats were more opposed to Hearst than the Republicans.

If the hardships of the winter at Valley Forge were trying for healthy men, they were, of course, much more so for those not in good health.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If there were no West Berlin problem, imperialist quarters would have invented an excuse for stepping up the armaments race to try to solve the internal and external problems besetting the United States and its NATO partners.

If the new Soviet series has followed the general pattern of previous Russian tests, the shots were roughly half fission and half fusion, meaning a fission yield of 30 to 40 megatons thus far.

If the Hessian troops sent here willy-nilly by the Hessian Government to fight for England in the 1770's were mercenaries, what shall we call the UN troops sent to the Congo willy-nilly by their governments to fight for the United Nations??

If the UN troops are not mercenaries then the Hessians were not mercenaries either.

If he were to go with White, he would be out there two days, not just listening in the dark at some point between here and Papa-san, but moving ever deeper into enemy land -- behind Papa-san -- itself.

If we are born of God we do not practice sin as a habit.

If you know that he ( God ) is just ( righteous ), know that everyone also who does what is just ( righteous ) has been born of him.

If we are born of God we love God.

If we are born of God we love the brethren.

If we are born of God we overcome the world.

If we are born of God we grow in ( not into, but in ) grace.

If we are born of God we persevere unto the end.

The well-known historian of physics, C. P. Snow, says about him, " If Fermi had been born a few years earlier, one could well imagine him discovering Rutherford's atomic nucleus, and then developing Bohr's theory of the hydrogen atom.

If he or she was born in the United States, Taiwan or New Zealand, he or she legally becomes 18 on February 28, 2014, a day earlier.

Giorgio Vasari quotes Michelangelo as saying, " If there is some good in me, it is because I was born in the subtle atmosphere of your country of Arezzo.

If a powerful solar magnetic storm is born, they can warn Earth in advance.

If there has been a first man he must have been born without father or mother – which is repugnant to nature.

If true, then Romulus and Remus would have been born in the year 771 BC, and have begun the founding of Rome at the age of 18.

If the name Zerubbabel is Hebrew, it may be a contraction of Zərua ‘ Bāvel (), meaning " the one sown of Babylon ", and referring to a child conceived and born in Babylon ; or perhaps even, Zərûy Bāvel (), meaning, " the winnowed of Babylon ", in the sense of being exiled in Babylon.

If a woman gives birth to a second son naturally when the first son was born by Caesarean section, that child is not redeemed either.

If Hook was 18-the last year of an Etonian-in that year, then he was born in 1876, a full one-hundred and one years after his appearance at The Pirates ' Conference below, and even further after the times of Blackbeard and Long John Silver.

If true, this would mean that he was born as early as 926 or 927.

If he was not born in Braga, it is likely he was born in the area around the town.

If the British people were ever to ask themselves what power they truly enjoyed under our political system they would be amazed to discover how little it is, and some new Chartist agitation might be born and might quickly gather momentum.

If born with another child and kept, parents must pay a large fine for every day he / she is alive.

If the couple's most famous child, Anne Boleyn, was born before 1505 ( as one school of historical thought contends ) then she too was born at Blickling.

If Cotton's story is to be believed, he was born around 1927, making him about 70 in the first season of the show.