3 ms·
There's one in Ithaca, NY too: http://www.sciencenter.org/sagan-walk.html http://www.sciencenter.org/sagan-walk.html
by minikites 7y ago
There's one in Ithaca, NY too: http://www.sciencenter.org/sagan-walk.html http://www.sciencenter.org/sagan-walk.html