To most people, a useless flint axe is just that. To archaeologist Sigrid Alræk Dugstad, it is a source of information about Stone Age children.
Whereas arrowheads, axes and other formal tools have traditionally received a lot of attention in research, the archaeologist Sigrid Alræk Dugstad…
Desert rose is the name given to rosette formations of crystal clusters of gypsum or baryte which contain an abundance of included sand grains. The rosette crystal habit tends to occur when the crystals form in arid sandy conditions. Gypsum roses usually have better defined, sharper edges than baryte roses. Celestine and other bladed evaporite minerals may also form rosette clusters.
Photo credit: Bruce Warren on Flickr
Rutile crystal sprays on lustrous Hematite. Origin: Novo Horizonte, Bahia, Brazil
Photo credit: Photo Copyright © Quebul Fine Minerals
The image depicts a live clam (left) and whelk (right) tucked into their shells. Unlike the clam, which can quickly slam its shell shut in response to danger, the whelk can only squirm back into the spiral recesses of its calcified fortress. But the whelk ultimately has the upper hand: it can drill into the clam’s shell and suck it dry. This image was produced by a team in Hong Kong that CT-scanned live organisms.
Credit: Kai-hung Fung, Pamela Youde Nethersole Eastern Hospital (Hong Kong)
A retaining pier wall, four shrines and an unusual circular structure dating to over 1000 years old, have recently been found by archaeologists of the National Institute of anthropology and history (INAH) in the pre-Hispanic site of Tabuco in Veracruz.
According to María Eugenia Maldonado…