Interspecies mating has long been thought of as a mistake. But in the desert, it may sometimes be the best way to breed.

Step 1: Dig tunnel. Step 2: Cultivate roots. Step 3: Profit.

The small village of Kivalina is threatened on several fronts by a warming Arctic climate, as the ground it sits on erodes, and the animals the villagers rely on become more difficult to hunt.

As a growing population ages, could computerized assistants provide medical support and companionship?