By using unnatural light, the insects traveled in the wrong direction.

VOA: special.2010.04.27

He went in. The plants all seemed wild and unnatural.

VOA: special.2009.05.30

Some people believe that Tut's death was unnatural.

VOA: special.2009.12.15

Instead,extreme events cause unnatural actions to form tsunamis.

VOA: special.2009.03.17

But it is an unnatural color for humans.

VOA: special.2009.11.15

"Brazil considers it unnatural to rush to sanctions before the parties concerned can sit and talk about the implementation of the declaration."

VOA: standard.2010.06.09