Seat belt 1967, Volvo started to install lap belts in the rear seats. In 1972, Volvo upgraded the rear seat belts to a three-point belt. In crashes, unbelted rear passengers increase the risk of belted front seat occupants' death by nearly five times. As with adult drivers and passengers, the advent of seat belts was accompanied by calls for their use by child occupants, including legislation requiring such use. Generally children using adult seat belts suffer significantly lower injury risk when compared to non-buckled children. The UK extended compulsory seatbelt wearing to child passengers under the age of 14 in 1989. It
Seatbelt basalt Lunar Sample Laboratory Facility at the Lyndon B. Johnson Space Center. A piece of it is on display at the National Air and Space Museum in Washington, DC. The seatbelt basalt is a highly-vesicular, olivine-normative, basalt with phenocrysts of zoned pyroxene and olivine within a matrix of pyroxene and plagioclase. The rock also contains ilmenite and ulvöspinel. The rock's cosmic ray exposure age was discovered to be about 285 million years. Another study determined the age to be 315 million years. The rock's age of formation has been estimated to be approximately 3.29 ± 0.05 billion years from Rb-Sr radiometric