Vattenfall cheer: team Nuna!

44 teams from 21 countries are in Darwin, Australia

in a high-tech convergence of man and machine.

One, two, three!

There's nothing like a competition to get people innovating and trying to beat each other.

Pushing the boundaries of technology is very important.

We also care about the environment.

Climate change is a big issue in the world.

These teams have designed and built vehicles powered only by the Sun.

They will attempt a 2,000 mile endurance race

straight through the middle of the Outback.

It is the premiere, most difficult solar race in the world.

It's not responding.

Oh my god.

Only one will bring home the trophy.