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Professor Jim Al-Khalili shows how, by uncovering its secrets, scientists have used light to reveal the universe.
2018
2.0
2005
8.0
2007
7.9
1964
7.4
2022
7.7
2009
2003
0.0
2017
2021
1974
6.8
7.0
1988
7.5
2004
6.0
2006
2013
7.1
1980
8.5
2015
2001
2012
2019
7.3
2023
1990
8.1
6.1
7.6
1996
9.0
6.6
5.4
2011
6.5
2020
4.4
1998
7.2
1955
5.8
7.8