Hey Engineer, you're a pilot, right?
When you are flying thousands upon thousands of feet in the air, does it seem as if you are flying over a flat plain or a sphere?
if there was mounds of evidence that the earth is flat, then wouldnt everyone believe that it's flat?
Actually, you do believe the earth is flat. As does everyone else. When you are walking down the street do your immediate senses tell you that you are walking on a plain, or a sphere?
Wow. These two comments alone show exactly the stupidity we're dealing with.
Let's use some proven numbers.
The earth is about 25,000 miles in circumference, give or take about 100 miles. The average human being is about five and a half feet tall, with a stride of anywhere from 2 to 4 feet. Now, with some math, that means the earth's diameter is about 8000 miles. Now if you walk from New York to Los Angeles, about 3000 miles, you're walking about 1/8 of the earth's circumference. That's 45 degrees of curvature, spread out over 3000 miles, about 0.015 degrees per mile. With 5280 feet in a mile, and about 3 feet per stride, that's 1760 steps. 0.015 degrees spread out over 1760 steps means 8.52272727 × 10^-6 degrees per step. Now, do you really expect the human brain to detect that sort of curvature?
EDIT: Sorry, my math was off. Fixed.