Fossils of angiosperms first appear in the fossil record about 140 million years ago. Based on the material in which these fossils are deposited, early angiosperms must have been weedy, fast-growing ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. In his vast correspondence with other contemporary naturalists, ...

A TEXT-BOOK by such an experienced teacher as Prof. H. H. Dixon -is very welcome. To judge from the introduction, this book represents in condensed form the series of lectures which the author has ...