Vaalbara is theorized to be Earth's first supercontinent, beginning its formation about 3,600 million years ago, completing its formation by about 3,100 million years ago and breaking up by 2,500 million years ago. The name Vaalbara is derived from the South African Kaapvaal craton and the West Australian Pilbara craton. These cratons were combined during the time of the Vaalbara supercontinent.

Identical radiometric ages of 3,470 ± 2 million years ago have been obtained for the ejecta from the oldest impact events in each craton. Remarkably similar structural sequences between these two cratons have been noted for the period between 3,500 to 2,700 million years ago.

Paleomagnetic data from two ultramafic complexes in the cratons showed that at 3,870 million years the two cratons could have been part of the same supercontinent. The reconstructed apparent polar wander path for the two cratons shows marked similarities. Both the Pilbara and Kaapvaal cratons show extensional faults which were active about during felsic volcanism and coeval with the impact layers.

Steven Dean Moore (born September 22, 1978) is a former Canadian professional ice hockey center, best known for receiving what turned out to be a career-ending injury as a result of an illegal hit (specifically, a punch to the head) by then-Vancouver Canucks forward Todd Bertuzzi.

Steven Dean Moore, his older brother, Mark, and younger brother, Dominic, all played four years at Harvard University. Because of their relative closeness in age, all three were able to play in the same year for Harvard during the 1999–2000 season. Dominic also went on to play in the NHL.

He was drafted by the Colorado Avalanche in the 1998 NHL Entry Draft in the second round, being 53rd pick overall. Moore played in 69 games for the Avalanche from 2001 to 2004, scoring five goals and seven assists before being seriously injured by Todd Bertuzzi who at the time played for the Vancouver Canucks (see below).

Due to continued post-concussion syndrome, Colorado opted not to give him a qualifying offer after his rookie contract expired, and he has had minimal contact with the Avalanche ever since. Moore also turned down a two-way contract from the Anaheim Ducks.