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How many grandfathers do you have?

How many grandfathers do you have? That would, of course, include all levels of grandfather. I have an inkling, but I would rather see what others would do to figure out an answer.
John Deethardt, 55+ U.S.

John F. Deethardt II

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Evolution vs Entropy

Evolution proceeds in the direction of the more complex. Entropy proceeds in the direction of the less complex. Hence it appears that these two are opposed and will eventually collide. If so, which will prevail and what will the outcome be? How will the end of our universe be affected by that outcome?
Howard Kleyn from Norfolk (Aged 55+)

How reliable is the use of DNA matching in forensic work?

How reliable is the use of DNA matching in forensic work? Can identical twins cause false positive or false negative (�not me, my brother�) evidence? What risk of false positive by pure fluke in in-breeding communities, e.g. Sikh villages, Norfolk Island?
George v dyke from Cornwall (Aged 55+)

Mass and the Big Bang

If twelve solar masses will produce a black hole, how come the big bang could result in an expanding universe? I.e. if all the mass of the universe come into existence at one place at the same time, how come no super massive black hole? Answer me that if you can.
Denis M Pointer from Warwickshire (Aged 55+)

As energy can neither be created nor destroyed, why can’t we conserve energy by converting low grade heat directly into electricity?

As energy can neither be created nor destroyed, isn’t there is a real opportunity to conserve energy and make efficient use of power by converting low grade heat directly into electricity. This concept has wide applications from data centres to factories and ultimately even in the home with domestic appliances, assuming the processes involved could be made efficient enough to be economic on such a small scale. Is there any research being carried out into the development of this concept?
John Woolley from Oxfordshire (Age 55+)

What happens to blood when we die?

Presumably our blood undergoes change when we die. If so, does it become more or less acidic and what does the pH value become?
Howard Eyre from South Yorkshire (Aged 55+)

Why do we see the same part of the moon’s surface?

Why do we see the same part of the moon’s surface? I cannot imagine that it is by mere chance that the rotations of the earth and the moon are perfectly synchronised. However, i cannot figure out what causes this unchanging connection.
Robert Roach from Cheshire (Aged 55+)