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A magnetic sense is now well documented in dozens of animal species. It turns out that tracking the geomagnetic field that same invisible thing that points compasses is handy for life, in lots of situations. Using their internal compasses, naked mole rats in Africa navigate their pitch-black underground mazes.

A clock that takes a year to complete a cycle gives new perspective on the passage of time. In many instances, it makes sense to measure time in seconds, minutes, or hours--if you're training for a marathon, scheduling meetings, or trying to make it home for dinner on time, there's really no other way to do it. But our obsession with small increments of time often keeps us from focusing on the bigger picture.

Yesterday’s Amazon product extravaganza shows how much its slate business has become like Apple’s--and how much it hasn’t. The founder and CEO paced across the stage before a massive screen displaying the company’s achievements in recent years--skyrocketing sales of media and a heritage of innovative, beloved gadgets. Then he brandished the new wonder, showing its surprising features and teasing with questions along the lines of "what should we charge for it?" before naming an equally surprising low price.

nes are revising their autumn itineraries as unrest in areas of the Middle East continues.

In April, University of Pennsylvania hosted the 15th annual Wharton India Economic Forum, an elite conference on growth opportunities in India. Among the attendees, who were predominately of Indian descent, was Adam Sachs, a 28-year-old Jewish kid from New Jersey. As it turns out, Sachs' two-year-old start-up, a group dating website called Ignighter.com , is one of the hottest new websites in India.