The publishers of Nature Lover Magazine are worried about its ( ). The number of readers has declined from over 40,000 five years ago to 15000 today.

sir isaac newton – he was a physicist, mathematician, astronomer, alchemist and natural philosopher in a row. he is known for his explanation of universal gravitation and three laws of motion, and he was able to prove that the reason of both the motion of objects on earth and of celestial bodies is controlled by the same neutral laws. in mechanical science, his great contribution was in optics. he could make a reflecting telescope and also made some research on light and stars. his research on general binomial theorem helped to be introduced today's calculus