New research shows the blast triggered secondary gravity waves that rattled the upper atmosphere, where satellites orbit.

A volcanic eruption in the South Pacific was so powerful that its shockwaves left the planet and reached space, new research ...

The two firefighters stranded above the blaze made a rare mayday call when "everything that could go wrong did go wrong".

The major party leaders went head to head on national security and the cost of living, in a fiery debate hosted by Seven.

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