For your entire life you've probably been told not to drink pond water, water that's been sitting for days or "dirty" water when you travel to other countries. What is it about this water that makes it so bad? Sure, it doesn't always look that refreshing when it's green or brown, but is there something else in it that makes it that dangerous? Check out the microscopic images these videos captured in pond-like waters!
This water was gathered, put in a beaker and then let on a balcony for three days! Look at what started to call that beaker home.
Here are 10 microscopic organisms that tend to grow, live and thrive in water similar to that water found in ponds. After seeing this, you'll think twice before you drink or swim in pond water again.