Author
Tyson, Neil deGrasse
7
Hawking, S. W.
6
Gifford, Clive
3
Greene, B.
3
Hawking, Stephen
3
Kaku, Michio
3
Lightman, Alan P.
3
May, Brian
3
Ringstad, Arnold
3
Rovelli, Carlo
3
Trotta, Roberto
3
Alexander, Stephon
2
Arcand, Kimberly K.
2
Cham, Jorge
2
Clark, Stuart
2
Clegg, Brian
2
Cox, Brian
2
Discovery Channel
2
Ferrie, Chris
2
Green, Jaime
2
Halpern, Paul
2
Kerrod, Robin
2
King, Stephen
2
Krauss, Lawrence M.
2
Lanza, R. P.
2
Lewis, Helen
2
Scharf, Caleb A.
2
Stenger, Victor J.
2
Teaching Company
2
Aguirre, Anthony
1
Allday, Jonathan
1
Alvarez, Walter
1
Arcade Pub
1
Arts and Entertainment Network
1
Bal, Floor
1
Briggs, Amy
1
Bunting, Phil
1
Buxner, Sanlyn
1
Cadogan, Peter H.
1
Carroll, Sean M.
1
Carvlin, Alec
1
Chin, Jason
1
Christian, David
1
Cliff, Harry
1
Close, F. E.
1
Clow, Barbara Hand
1
Conway, Andrew
1
Cornell, Kari A.
1
DK Publishing
1
DK/Penguin Random House
1
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