The remains of a real-life journey to the center of the Earth are preserved in a South Pacific volcano, a new study suggests.
The lava that erupted from the Cook Islands volcano, called Mangaia, contains a few tiny grains of sulfide, a mineral, with a peculiar ratio of sulfur isotopes, according to research published in today's (April 24) issue of the journal Nature. The unusual ratio could only have formed before oxygen-breathing life appeared on Earth 2.45 billion years ago. Isotopes are versions of elements with different numbers of neutrons, giving them differing weights.
Start the week off right with a gorgeous sunrise photo at Tipsoo Pond in Mount Rainier National Park.
Mount Rainier National Park is spread over 235,625 acres on the west side of the Cascade Range, and is located about 50 miles (100 kilometers) southeast of Seattle. Mount Rainier is an unmistakable icon on the landscape. With a peak 14,410 feet (4,392 meters) above sea level, Rainier is an active volcano and its last known eruption was in 1894.