When to Cull Science Books?

[jenny_islander]

DH just found the Life Science Library and Life Nature Library from the early '70s in the attic. These are the good editions from the days before they went to large print and small words. I spent hours with the same books. My question is, which ones need to go? We have a stack about as tall as Sophia that includes books on different aspects of natural history, biology, medicine, chemistry, physics, mathematics, engineering, and astronomy. Should I just save the math one and the one about polymers and let the others go? WWYD?

[Rabbit]

They're very close to worthless.

That said, I wouldn't be able to throw them out, either. The pictures alone are gorgeous, and for an older child, it's neat to read back on old theories, and study how much has changed.