This marine chronometer was given to President Ronald Reagan by singer Frank Sinatra. The quest for the Longitude Prize spurred a wave of innovation and ingenuity in the scientific community.

English clockmaker John Harrison revolutionized long distance seafaring in the 18th century, solving the problem of calculating longitude at sea and devising tools that helped sailors navigate with ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument is a specialized ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. British clockmaker John Harrison helped make marine navigation safer for sailors around the world and his 325th birthday ...

Today's Google Doodle celebrates the birthday of John Harrison, who invented the first accurate way to measure longitude. Before 1735, if you wanted to sail across the ocean, you could only guess at ...

British clockmaker John Harrison definitely had time on his side. The self-educated horologist and carpenter was born on April 3, 1693, in Foulby, Yorkshire. He is known as the man who came to the ...