Less than 10 miles south of Interstate 80 east of Evanston is a cluster of 30-foot limestone beehive-looking things. Built in ...

The site is now covered by a protective canopy. More than 20 light-colored limestone structures climb the hill of Göbekli Tepe, a 45-foot-high rise on a rolling plateau in southeastern Turkey.

The fine powder remained behind. Passchier also found very similar structures during field work in Oman and in Saudi Arabia -- in Oman in limestone, while in the Saudi Arabian desert they were in ...

But for one oddball microbe, desert limestone seems to have been on the ... “A biotic origin of the observed structures supposes the presence of liquid water, without which biological growth ...