Five examples of failed experiments that produced valuable information

The following examples of failed experiments that produced valuable information

1) Bubble Wrap: The scientists were trying for  trendy new textured wallpaper, they failed miserably ,however the new wrap was a breakthrough in packing industry

2) Pacemaker: During development of a  heart rhythm recording device, Greatbach  pulled out the miss sized small resistor which sounded like a human heartbeat and thus leads to development of pacemaker

3) Synthetic Dyes are also discovered during synthesis of antimalarial drug

4) Radioactivity : it was also a serendepity

5) Discovery of penicillin.

let that person have a turn to speak : )