When was the hourglass first used?

Answer The first hourglass was used in the early 1300's. The first evidence of the hourglass is a fresco by Ambrosio Lorenzetti, painted in 1338 in Italy. Claims that the Greeks were using hourglasses bef... Read More »

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When was the hourglass invented?

The invention of the hourglass dates back to the mid-14th century. It is believed that the hourglass was used on ships to measure the speed and distance traveled while at sea. They are also known a... Read More »

When was velcro first used?

Velcro---the hook-and-loop style fastener that carries the "Velcro" brand name---was first used in 1953. George de Mestral, a Swiss outdoorsman and inventor, conceived the idea for Velcro after not... Read More »

When was dna fingerprinting first used?

DNA fingerprinting was developed in England in 1985 by Sir Alec Jeffreys. DNA was first introduced as evidence that same year, but it wasn't until 1988 when Colin Pitchfork was on trial for the rap... Read More »

When did mmr vaccinations first used?

Depends what country you are refering to. In England I belive it was introduced in 1988. Refer to In USA, it was introduced in 1963. Refer to h... Read More »