Another week, and another set of pictures that will be tough to select. Well done, everyone! As always, please choose a photo that best represents our theme. This time, it is a photo of someone's back, or a group of people's back. 1. redpenguin 2. AlephZero 3. Andy Resnick 4. Marzena 5. Gokul43201 6. Jonathan Scott 7. ZapperZ 8. physics girl phd 9. turbo-1 10. Borek Zz.