Life span/survival rates of C. elegans exposed to MAPbI3 or MASnI3 perovskites. (a) L3-stage larvae were inoculated into microfluidic device in different chambers where regular bacterial food containing or not MAPbI3 or MASnI3 was sequentially injected. Survival rate was evaluated every 20 min by live imaging. All the histograms show an average of at least 3 independent repeats (each condition in triplicate). Bars are means ± S.D. One-way ANOVA test followed by a Tukey-Kramer post-hoc test were performed (non-exposed vs MAPbI3 or MASnI3 exposed flies or worms), *p<0.05, **p<0.005  and ***<0.0005.