what's the word

[dunes]

Hello, could you please suggest suitable words for these blanks?
"Some other scientists claim the dinosaurs were destroyed by acid rain, ............by a passing "death star," .......................... even by visitors from outer space."

Thank you in advance.

[amigos4]

Hello, could you please suggest suitable words for these blanks?
"Some other scientists claim the dinosaurs were destroyed by acid rain, ............by a passing "death star," .......................... even by visitors from outer space."

Thank you in advance.

Hi, dunes!

What words do you think could be used? In its present format, your sentence limits the number of choices you can insert. Let us know what words you would use!

Cheers,
A4

[dunes]

1st one: caused or produced
2nd one: perhaps?

[Bennevis]

"Some other scientists claim the dinosaurs were destroyed by acid rain, CAUSED by a passing "death star," or PERHAPS even by visitors from outer space."

[amigos4]

1st one: caused or produced
2nd one: perhaps?

Nicely done, dunes! You get a gold star for your efforts!!!

[dunes]

Thank you both Bennevis and Amigos4