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Watch: Yosemite waterfall turns molten orange

The event occurs only in February, when the setting sun hits Horsetail Fall in Yosemite National Park at just the right angle.

The event occurs only in February, when the setting sun hits Horsetail Fall in Yosemite National Park at just the right angle.

Ronnie O'Sullivan, 50, is set to make his debut in the World Seniors Snooker Championship at Sheffield's Crucible Theatre in May.

Ronnie O'Sullivan, 50, is set to make his debut in the World Seniors Snooker Championship at Sheffield's Crucible Theatre in May.