Many of Laplace's other physical theories were attacked, for instance his caloric theory of heat was at odds with the work of Petit and of Fourier . However, Laplace did not concede that his physical theories were wrong and kept his belief in fluids of heat and light, writing papers on these topics when over 70 years of age.
Marami ng Laplace ng iba pang mga pisikal na theories ay attacked, halimbawa ng kanyang mainit teorya ng init ay sa mga tira sa ang gawain ng Petit at ng Fourier. Gayunman, Laplace ay hindi pumayag na ang kanyang pisikal na theories ay mali at malinis ang kanyang paniniwala sa fluids ng init at ilaw, pagsusulat ng mga papeles sa mga paksang ito kapag higit sa 70 taong gulang ang edad.