Will Solar Impulse 2 inspire a whole fleet of solar-powered planes?

Now that a solar-powered plane has set an amazing record, we're ready with the next question: Will there soon be a fleet of solar-powered planes?

Not quite, but airlines are moving in that direction.

On Friday, Andre Borschberg, in a plane powered completely by the sun, pushed past Amelia Earhart-esque territory — completing a five-day solo flight across the Pacific, from Japan to Hawaii. It the longest leg on a planned around-the-world trip for the solar-powered plane.

Not only did Borschburg make it, he got a lei around his neck.

"This particular flight is really on the edge of the envelope," MIT aeronautics professor John Hansman says. 

Borschberg touched down outside of Honolulu at dawn this morning. At 120 hours, it was the longest solo flight ever. And the plane did it without a drop of fuel. It was powered instead by 17-thousand solar cells mounted on its 236 foot-wide wings.

Borshberg says he himself was also powered through the flight by yoga and meditation.

First thing he says he wants to do now, after five days in the air, is take a shower. And the next stop for Solar Impulse 2 after a layover in Hawaii is Phoenix, Arizona, en route to Abu Dhabi, where the plane first set out on March 9.

Will Solar Impuse 2 inspire a whole fleet of solar planes? Even small planes? Not quite yet, says Hansman, given the power limitations of current solar panels.

However, those panels are improving rapidly. One start: biofuels.

Earlier this week, United Airlines announced it was investing $90 million in a 10-year effort to use jet fuel made from solid waste.

When it gets hot, these bearded dragons change their sex

It's never been seen in the wild before now, as least in reptiles. Researchers have published a study demonstrating that when the mercury rises, the Australian bearded dragon changes its sex.

The study, in the journal Nature, refers to the change as "sex reversal"  which means that the bearded dragons actually have genes and sex chromosomes of a male individual, but they look, act, behave and, incredibly, reproduce just like females.

Even more surprising is the reason the sex reversal takes place. The researchers showed that by incubating the bearded dragon's eggs in very warm temperatures (above 89.6 degrees) you can trigger them to reverse sex.

The lizards switch from having its sex determined by genes to having it determined by temperature.

There are examples of sex reversals known in fish like the parrotfish that start life as females and change to males. There are amphibians as well. But, it's the first time the it's been demonstrated in the wild by a reptile.

Is this remarkable change a positive thing for the bearded dragon? That is, does this suggest that animals are adapting and surviving, or will something like the temperature increases from climage change ultimately lead to them becoming extinct?

"That’s actually one of the big questions that we don’t quite have an answer to yet," say Clare Holleley, lead author of the study. "There’s sort of two definite possibilities: If the climate does continue to warm exponentially and they don’t have a chance to adapt then of course the populations are going to become increasingly female. If you go to the complete extreme where there is only females, that’s of course going to threaten the survival of the species."

However, there is a possibility that they may be able to adapt to climate change.

"Indeed, some could argue that maybe being able to manipulate your sex ratio by adapting and laying your eggs in different temperatures in different regions, could potentially be a benefit to the species," Holleley says. "We’re not to sure whether it’s a good thing or a bad thing yet."