Refat E Ferdous

Scientists Discovery about Niagara Falls in 1969

now if you could get into a time machine and travel back to 1969 you'd see something spectacular what you're looking at isn't some random desert it's one of the most powerful waterfalls completely dry in the summer and fall of 1969 the American side of Niagara Falls stayed without water it lasted six months researchers wanted to study the rock face of the falls they were afraid it was going to become too unstable because of erosion erosion is the