Thank you for your input apostoli,I would agree with you if you were right:-D
However:
According to the english dictionary the following is correct:
Spelling Usage Grammar Punctuation Pronunciation Links
Q: Is phenomena a singular or a plural word?
A: Usage varies for the plural ending of nouns derived from Latin and Greek. For phenomenon you should never use the false singular phenomena, as in This phenomena occurs only in the southern hemisphere. The correct form is This phenomenon occurs… It’s equally wrong to attach an -s plural to the already plural phenomena, as in These natural phenomenas are fascinating. Say instead These natural phenomena are…. The alternative plural phenomenons does exist but it’s never used in scientific or philosophical contexts — it’s only acceptable in the meaning ‘extraordinary people, events, or things’, as in She is recognized as one of the greatest sporting phenomenons of our time.