Download Do Not Open: An encyclopedia of the world’s best-kept by Dorling Kindersley PDF
By Dorling Kindersley
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Extra info for Do Not Open: An encyclopedia of the world’s best-kept secrets
The ship’s clock was upside down and had stopped. The sextant (instrument for celestial navigation) and chronometer (shipping timepiece) were missing. The Captain’s bed was sodden and there was water between the decks. Under the bed was the Captain’s sword, with red stains. The lifeboat was missing, leaving a frayed rope. The cargo of 1,700 barrels of pure alcohol was intact, except for nine empty barrels. On board, there was food to last six months. The last entry in the ship’s log was about a week old.
Of our eyes The pattern of marks in the iris is as unique as a ﬁngerprint. he iris in t o t n r inal! patte ifferent is is truly orig d a s a ir h one eye ther eye. Each all in is ir o e me . Th a the s e ife ys th your l a t s h r iris throug to You ras e. e ey am ll c your a o sm of int e. use raph d s e d g em lat c co yst photo s s i n d n t tra metr ﬁn e. itio nstan n e g o i d b io o t rec ke an y co an a b r s c i r c a o I d t s ri ph calle em et a r m m g m ts bio i oto l for h p ta ns he ca or t Iris digi s f r a te tch u p m ma co a A 62 63 Iris recognition Ir m is re a ach co pr in gn iva es it te an ion Pe d co rs cre ul on d d al it c be Id ar us en ds e tiﬁ in d f ca st or tio ea ca n d o sh Nu f m us be in r( g PI N) .
How the numbers add up Below are the numbers 0 to 9 in their bar code form. For each number there are two versions—the ﬁrst one is used in the ﬁrst half of the bar code and the second version is used in the second half. The second version is the same as the ﬁrst, but substitutes bars for spaces, and vice versa. Representing the numbers in the two halves in a different way like this means that the bar code can be scanned in any direction and the computer can still ﬁgure out which bit of information is which.