TWO BIRDS WITH ONE STONES: Heavy radiation suits for Mars will also reduce low-gravity bone loss. Plus: “Someone taking a hike on the surface of Mars could easily carry a backpack that weights hundreds of pounds on Earth. A longer duration hiking trip on Mars would be possible because of the amount of weight hikers could carry. If the hikers had a cart to put their equipment on and pushed the cart a pair of hikers could probably easily push materials that would weigh 700+ pounds on Earth.” Do bear in mind, of course, that weight declines but inertial mass remains the same.