WASHINGTON: A previously-unpublished letter written by physicist Albert Einstein in 1945 to a US soldier where he explains that “space should be looked at as a four-dimensional continuum” is up for sale for $40,000.
The typed, one-page letter was Einstein’s reply to SergeantĀ Frank K PfleegorĀ and his friends who were puzzled by a scientific article they read and sought to clear up their confusion with the help of the 20th Century genius.
The original letter to Einstein, dated April 17, 1945, has been published and remains in the Einstein Papers at Jerusalem University.