With a friendly and enthusiastic tone, Gundry explains his view that eating a healthy diet can turn off genes in the human body that lead to weight gain and chronic disease. Gundry's rather complex three-phase diet plan focuses on reducing or eliminating grains and sugar, in favor of lean protein and large amounts of vegetables. The initial phases of Gundry's eating plan bear some similarities to the Paleolithic or caveman diet, as presented in books such as Ray Audette's NeanderThin or Loren Cordain's The Paleo Diet.
John Glenn: First American to Orbit the Earth. On the morning of February 20, 1962, millions of Americans collectively held their breath as the worldâs newest pioneer swept across the threshold of one of manâs last frontiers.
Glenn returned to space at age 77 aboard the space shuttle Discovery in 1998, making him the oldest person to fly in space. His missionâs primary scientific aim at that time was to study the effects of spaceflight on seniors. Bottom line: John Glenn became the first American to orbit Earth on February 20, 1962. His space capsule was called Friendship 7. Read more from NASA about John Glenn and Friendship 7.