http://www.sciencemag.org/news/2018/08/quantum-chicken-or-egg-experiment-blurs-distinction-between-and-after?et_cid=2274162&et_rid=377420400
http://www.sciencemag.org/news/2018/08/quantum-chicken-or-egg-experiment-blurs-distinction-between-and-after?et_cid=2274162&et_rid=377420400