In the winter the temperatures dip below zero, so many people vacation in warmer climates.

How much clothing do you like to wear when you sleep? ... (At this time winter bags, rated to 0°F or below, can't be tested accurately using available equipment.) ... underwear and a hat is placed in the sleeping bag, which is set atop a sleeping pad in a climate-controlled chamber. ... This is a rating for a true emergency situation, not an enjoyable backpacking trip. ... for summer backpacking even though the temperature almost never dipped below freezing, and she was rarely too warm.

lab rats that ate more artifical sweeter gained more weight than those who ate sugar and they had “lower levels of a hormone called glp-1, which affects how full we feel.”