https://padlet.com/megan_stroud/lz9u3inlqnov en-us 2017-01-31 15:07:12 UTC 2017-02-01 10:24:38 UTC hello@padlet.com https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150771410 By mathematician René Thom in the 1960s became popular because of Christopher Zeeman in the 1970s]]> 2017-02-01 09:36:45 UTC https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150771410 https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150773477 2017-02-01 09:46:54 UTC https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150773477 https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150774142 2017-02-01 09:50:07 UTC https://padlet.com/megan_stroud/lz9u3inlqnov/wish/150774142