It would appear that his scientific genius had still not emerged, but it did so suddenly when the plague closed the University in the summer of 1665 and he had to return to Lincolnshire. There, in a period of less than two years, while Newton was still under 25 years old, he began revolutionary advances in mathematics, optics, physics, and astronomy.
Ito ay lalabas na ang kanyang pang-agham likas na talino ay hindi pa rin lumitaw, ngunit ito ay kaya biglaan kapag ang mga salot sarado ang University sa tag-init ng 1665 at niya upang bumalik sa Lincolnshire. Doon, sa isang panahon ng mas mababa sa dalawang taon, habang Newton ay pa rin sa ilalim ng 25 years old, siya ay nagsimulang rebolusyonaryong pagsulong sa matematika, optika, physics, at astronomy.