Student or Learner
I'm not sure about the meaning of "over" in this excerpt:
"An astonising discovery was made a couple of years ago by a group of researchers from the Zoological Society of London, who went to Panama to investigate social life of local wasps. The group was equipped with a cutting-edge technology, which it used over 6000 hours to track and monitor the movements of 422 wasps coming from 33 nests . What the researchers found out, has turned upside down their and ours centuries-old stereotypes of the social insectís habits".
Does it mean _for 6.000 hours_ or _for more than 6.000 hours_? Grammatically, it should mean "during a period of 6.000 hours", shouldn't it?
As you all said above, can I use the form "over period of time" instead of "for period of time" ?
E.g: "over a year" for "for a year" ?
I think it is possible but not in any case/context.
Thank you so much !