Chicken or egg? In this image from our Pictures of the Year 2025, Nat Geo photographer Anand Varma spent years documenting when an egg yolk can still be seen, but a bird form has clearly emerged. He finally captured the transformation at 12 days old. Varma separately raised some embryos to chicks, like the one above, which he donated to people in the community.
See more pictures: on.natgeo.com/49dAznt