He said the shuttle trip -- during which he will be subjected to a battery of tests to determine the physical effects of space on a person of Glenn's age -- should help provide new insights into aging that could help people on Earth.

CNN: Glenn 'loved every minute' of space training

As Josephine Tey so elegantly demonstrated in her 1951 crime novel "The Daughter of Time, " no modern court would convict Richard III of the murder of the princes in the Tower, whose possible skeletons discovered in 1674 under the staircase leading to the chapel ought now to be disinterred from Westminster Abbey and subjected to DNA tests and modern pathology examinations.

WSJ: Andrew Roberts: Shakespeare Has a (Parking) Lot to Answer For

The authors' interpretations and extrapolations of it have not been subjected to any decisive tests, and it is not clear that they ever could be.

ECONOMIST: Understanding the universe