North and South America touch at the .

Look at the map. You'll see a little stretch in between, with parts that will go to Colombia,  or to Mexico for North America- but Mexico is a different country itself (from the United States and Canada), so go up from Mexico. But this is all still North America.

Therefore that is how North and South America touch.

isaac newton first proposed that earth was not perfectly round. instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.

the idea of the earth being a flat disc is also inconsistent with the fact that a given lunar eclipse is only visible from half of the earth at a time. the only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient greeks deduced that this must mean the earth is spherical.

maybe you need to work on the pipes in the house. i am just saying this because you did not give any details.