THE EV­I­DENCE: A LUMP OF MOON ROCK

World of Knowledge (Australia) - - Science -

The re­search team – led by Paul War­ren (left), Ed­ward Young (cen­tre) and Is­saku Kohl (right) of the Uni­ver­sity of Cal­i­for­nia in Los An­ge­les – ex­am­ined rock sam­ples brought back from the moon by the Apollo 12, 15 and 17 mis­sions. When they com­pared them to sam­ples from Earth, they found the oxy­gen con­tent was al­most iden­ti­cal. This pro­vided the re­searchers with ev­i­dence that Earth and the moon are made of the same ma­te­rial – mean­ing Theia must have merged with our planet. If Theia had just sideswiped Earth, the moon would have a dif­fer­ent chem­i­cal fin­ger­print.

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