The National Geographic contributing photographer Joe Sartore explains "The Great Nature Project" to celebrate the magazine's 125th anniversary, plus Dr. and author William Sears and his wife RN Martha talk about their new book "The Healthy Pregnancy Book" and we'll explore the cosmos with our planetary pundit Astronomer Richard Walker (Longway Planetarium) on The Tom Sumner Program Tuesday September 24 beginning at 3 p.m. Hear Tom and Andrea weekdays streaming LIVE at