Notice how some of these tomatoes have unripe-looking tops? Those "green shoulders" are actually the keys to flavor. pocius/Flickr.com hide caption

itoggle caption pocius/Flickr.com

Barbara and Norman Roux stand in front of cattle pens on their farm outside of Moundridge, Kan., where she has raised cattle for nearly 70 years. Peggy Lowe/Harvest Public Media hide caption

itoggle caption Peggy Lowe/Harvest Public Media

Only Luxembourgers eat more meat per person than Americans. iStockphoto.com hide caption

itoggle caption iStockphoto.com

An artist's illustration of events on the sun changing the conditions in near-Earth space. NASA hide caption

itoggle caption NASA