100 and 50 years ago.

Recounts previous articles published in the journal "Nature" in the U.S. Presentation of a paper by Percival Lowell before the American Philosophical Society on the 375 drawings of the Martian surface made by him during the opposition of 1903, featured in the May 1904 issue; Previous publication on the relevance of ancient Greek thought to present-day scientific philosophy, published in the May 1954 issue.