PennDOT will begin a $22 million project to prevent more sinkholes from forming. Crews will drill holes in a grid pattern ...
Thundereggs look like regular rocks from the ... In some cases, erosion can wear away the outer layers of the thundereggs ...
"With these results, the pattern is starting to make a lot more ... the new findings also help explain links between the erosion of rock and the emergence of complex organisms about 530 million ...
Rock art of this size is also rare in the region. More ancient discoveries: The researchers, who published their findings in the Journal of Archaeological Science, assessed erosion patterns ...