Science offers a rational explanation: many floating stones are pumice, a volcanic rock formed when lava cools rapidly, trapping gas bubbles. These air pockets make pumice less dense than water ...

The pyroclastic igneous rocks have turned into pebbles after floating on water and rubbing against one another for two months or so. Banks of pumice have covered the surface of the sea along the ...

NAHA--Massive amounts of floating pumice stones spewed by an underwater ... The institute said the stones will eventually absorb water and sink, becoming homes for shellfish, but it cannot predict ...

The stretch of golf-ball-size pumice rocks was first spotted this week by a New Zealand air force plane about 1,000 kilometres northwest of Auckland. The rocks stretch for about 26,000 square ...