Quark
The quark model was independently proposed by physicists Murray Gell-Mann and George Zweig in 1964. Quarks were introduced as parts of an ordering scheme for hadrons, and there was little evidence for their physical existence until deep inelastic scattering experiments at the Stanford Linear Accelerator Center in 1968. Accelerator experiments have provided evidence for all six flavors. The top quark, first observed at Fermilab in 1995, was the last to be discovered.
Daniel Quare
When Quare began his career horology was rapidly advancing. The pendulum was a novelty; so were the spiral spring and anchor escapement invented by Robert Hooke, and the fusee chain. To Quare belongs the honour of inventing repeating watches, and it is also claimed for him that he adapted the concentric minute hand. If he was actually the inventor of the latter, he must have constructed it early in his career, for two concentric hands are shown in a diagram in Christiaan Huygens's "Horologium Oscillatorium" (1673). Clocks and watches made by Quare with only one hand are extant, or with two circles and pointers, one for the hours and another for the minutes, and the concentric invention did not quickly supersede this arrangement even in Quare's own workshop. In the "London Gazette" for 25–29 March 1686, is an advertisement for a lost "pendulum" watch made by Quare, that had only one hand, but was curiously arranged to give the minutes: "it had but 6 hours upon the dial plate, with 6 small cipher figures within every hour; the hand going round every 6 hours, which shows also the minutes between every hour."