To investigate this, Dr. Haowen Fan of China University of Geosciences and colleagues analyzed speleothem records from Heshang Cave in central China that span 2,000 years. These mineral deposits ...

Cave pearls are a type of speleothem found in caves. They are round, pearl-like formations usually between 0.1 mm and 30cm long. They form around central nuclei, such as sand grains covered in ...