The first reliable spark plug was invented in 1903 by Oliver Lodge. They're aptly named as well; spark plugs are simply insulated plugs that are screwed into an internal combustion engine's cylinder head to deliver the spark that ignites the mixture of air and fuel in the combustion chamber.
Are Irish Twins Technically Twins? Irish twins are not technically twins, meaning two people born from the same gestational period. It's a colloquial way to classify siblings that are born close together. Sometimes the use of the term Irish twins is expanded to describe any siblings that are close in age. Some even stretch the definition to include siblings less than two years apart. Some would call that almost Irish twins or practically Irish twins..
Guinness World Records has declared the pair from Scotland the world's oldest twins. Guinness World Records (CBS) The world's oldest twins are a pair of 102-year-old Scottish sisters, Guinness World Records announced Tuesday. Meet Edith Ritchie and Evelyn Evie Middleton. They were born on a farm near Newburgh, Scotland, on November 15, 1909.