"Other researchers have made live frogs and grasshoppers float in midair before, but such research with mice, being closer biologically to humans, could help in studies to counteract bone loss due to reduced gravity over long spans of time, as might be expected in deep space missions or on the surfaces of other planets."
I get what they're saying about not flipping over the bars, but personally, I'd rather be able to bail out to the back or sides. The way they are describing basically just throws you into an object, whereas with the back/sides you're able to avoid objects and roll on the ground. If you're going fast enough to flip over the handle bars: (a) you're probably not going to be able to brake in time anyway, and (b) it's probably not much better to just get launched straight into whatever you're trying to avoid.
Go to bed and wake up at the same time every night/day. Also, avoid using 'snooze' and taking naps. If you're not used to it, then you really have to be determined at first, but there's definitely a noticeable difference after a week or two. If you're consistent, your alarm will become obsolete.
http://news.ycombinator.com/item?id=1121775