First models of the 'impossible triangle' and 'impossible staircase'
1955-1959
Set of 76 green and 124 brown chicken shaped pieces of cardboard
1974-1980
Handbook with new methods for General Relativity developed by Roger Penrose and Wolfgang Rindler
1984
Book with debate on consciousness with participation by Roger Penrose, including commentary by Stephen Hawking (figure captions of draft version)
1995
Book on debate between Roger Penrose and Stephen Hawking
1996
Book on debate between Roger Penrose and Stephen Hawking (hardback version)
1996
Book with debate on consciousness with participation by Roger Penrose, with commentary by Stephen Hawking
1997
Book with debate on consciousness with participation by Roger Penrose, including commentary by Stephen Hawking (draft version)
1995
Book on debate between Roger Penrose and Stephen Hawking
1996
Book with debate on consciousness with participation by Roger Penrose, with commentary by Stephen Hawking
1999
Set of 76 green and 124 brown chicken shaped pieces of cardboard
1974-1980
First model of the impossible staircase
1955-1959
First model of the 'Impossible triangle'
1955-1959