How recent should my sources be if I'm writing a scientific essay?

One of my sources is from 2012, I was wondering if it's acceptable.

Question

How recent should my sources be if I'm writing a scientific essay?

One of my sources is from 2012, I was wondering if it's acceptable.

brittany67 · Answer

Well if your teacher is like myn she would want and updated from this year if u cant find it or any info try to find closer to this year
hoped this helped
plz fan and medal

anonymous · Answer

I suppose it depends on the topic and your teacher.
My teacher let me use an article from 1999!
Always ask your teachers these questions, Good Luck! :]