Article date: Apr 1975
Article title: Six sensational discoveries that somehow or another have escaped public attention
Mathematical Games column? Y
Book: 12. Time Travel and Other Mathematical Bewilderments
Chapter: 10. Six Sensational Discoveries
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (2 September 2022):
I have seen copies of Scientific American April 1975 and Six Sensational Discoveries in Time Travel and Other Mathematical Bewilderments and these match.