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The £4bn "Big Bang" machine, which suffered a catastrophic malfunction soon after being switched on last September, is expected to be restarted in June.

It is the sound every would-be Tiger Woods yearns for – the sweet high-pitched "thunk" as the oversized head of their favourite driver sends the ball soaring up the fairway.

Hundreds of thousands of years ago, giant versions of Australia's unique wildlife stalked the continent. There were kangaroos up to 3m tall and enormous wallabies, wombats and echidnas. There were also koalas: larger and weightier than the creatures sometimes seen today in eucalyptus trees.

A British clinic has dramatically improved the success rate of fertility treatment using frozen embryos, promising improved pregnancy rates and offering hope to thousands of women who would otherwise face years of traumatic hormone therapy.

The number nine has a special significance for Mark Sykes, director of the Planetary Science Institute in Tucson, Arizona. Nine is the number of planets in the Solar System, and Sykes is one of several leading astronomers who want to keep it that way.