The Highway Code Great Britain version, available in English and Welsh, applies to England, Scotland and Wales, but regional specific signs such as driver location signs in England or bilingual signs in Scotland and Wales are not covered. The Northern Ireland version, available in English and Irish, applies to Northern Ireland. Costing one penny, the first edition of the Highway Code was published on 14 April 1931. It contained just 18 pages of advice, including the arm signals to be given by drivers and police officers controlling traffic. The second edition, considerably expanded, appeared in 1934, and now illustrated road signs for the
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