Researchers examined some of the oldest rocks in western Greenland to probe the beginnings of today’s continents.
The water contains bacterialike shapes that researchers plan to test for DNA.
Some bubbles grow to be more than a quarter-mile across.
Scientists now know much more about the underground cavities in the sand that nearly killed a boy in 2013.
Newly-discovered fossil deposit contains more than 50 unknown species from the Cambrian Explosion, when most complex body plans appeared.