more dangerous

But Morrison said he felt it was more dangerous to leave and potentially end up being trapped on a narrow roadway.

In an already desperately unstable and volatile region, that could feed more dangerous unrest.

"What our data suggests in terms of cancer prevention is that the events that occur when we're young are probably much more dangerous than the events that occur later," he says.

This era is more dangerous than any he has known in his career and the world more contested than ever, he said.

Even big electric cars have issues because they take up more room and are more dangerous than smaller electric cars, he adds.