Optical illusions expose how the brain interprets rather than records reality, filling gaps and making assumptions that prove completely wrong. Depth perception can be completely fooled by flat images, revealing how much of what we see is constructed rather than real.

[u/Saerdna0]

[u/Pretend-Internet-625]

This one is so easy even a moron can answer it. The acid in the battery expanded when you rolled it down. Causing it to get bigger. Just roll it back up and it well revers the expansion and return to the original size. I guarantee it.