The zinc spark is an inorganic signature of human egg activation User trot-trot, in the Health subreddit, 26 Apr 2016
The zinc spark is an inorganic signature of human egg activation User trot-trot, in the r/TwoXChromosomes: You are the community. You have all the power of the internet to mold it. subreddit, 26 Apr 2016
The zinc spark is an inorganic signature of human egg activation User trot-trot, in the Damn, that's interesting! subreddit, 26 Apr 2016
The zinc spark is an inorganic signature of human egg activation User trot-trot, in the Reddit Science subreddit, 26 Apr 2016