Diwali is here, which means that this photo is being forwarded to phones around India with the caption "NASA satellite image of India on Diwali night".
Only, here's the thing. It's not. It's actually a 2003 image by scientist Chris Elvidge, with the different colours highlighting India's population growth over time.
Despite being disproven several times every year, people just can't seem to stop sharing it every time they see it.
The captions may change, but the disease is the same.