Scientists can’t know precisely when a volcano is about to erupt, but they can sometimes pick up telltale warning signs.

Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than previously thought — and may be a big reason that our planet harbors life.

Lead author Nick Mortimer noted the scale of magma eruptions across Zealandia ... Rock samples from Fairway Ridge near New Caledonia revealed granite formations belonging to a 4,000 km-long geological ...

Check out Southern California's 6 best national parks for families, from big trees to big sky for big adventure.