Recent research highlights that the role of calcifying plankton in regulating global climate may be more significant than previously represented in existing climate models.
Reprinted from June 27, 2003, this mystery is worth considering still. What caused these global deposits that are not being formed today? R. H. Dott, Jr (Univ. of Wisconsin) has a problem. He’s been trying to explain a geological puzzle for 50 years, and it is still unresolved.