limestone

(Newser) - One of Australia's most beloved attractions is its 12 Apostles—ancient rock formations poking out of the waves off Victoria's coast. Scientists say they're in awe after discovering five "Drowned Apostles" in a linear formation hiding 160 feet underwater a few miles offshore. Melbourne University PhD...

(Newser) - Bacteria that secrete minerals are a well-known tool for "healing" cracked limestone statues, and the process got a Dutch scientist thinking. He theorized that concrete seeded with bacteria and a substance they transform into calcium carbonate would create a material that's able to seal cracks as they form. It...