Baryonic feedback refers to the modification of the matter distribution due to baryonic processes such as stellar winds, AGN jets, etc. The effect is a nuisance to weak lensers, who proclaim to accurately constrain cosmological parameters by measuring the universe's power spectrum. In this talk, after providing a review of the community's effort to address the systematics through various approaches, I will present our measurement of baryonic feedback, which is the first detection purely based on cosmological lensing surveys. The study illustrates tremendous future opportunities available in the era of the Stage IV weak lensing surveys enabling precision cosmology but also improving our understanding of sub-grid astrophysics.