Australia's Pink Lake Has a Secret That Scientists Still Cannot Explain

Off the south coast of Western Australia sits a lake that looks like it was filled with bubblegum milkshake, and has stayed exactly that shade of pink every single day since it was first recorded by Matthew Flinders in 1802.

Unlike other pink lakes around the world, which shift and fade with the seasons, Lake Hillier never changes, and that consistency has made it far harder for scientists to study than anyone expected. This video looks at what genuine peer reviewed research has found living in the water, why a 2022 metagenomic study still couldn't confirm exactly what's responsible for the colour, and why this remains one of the few natural mysteries in Australia that science genuinely has not closed yet.