<human>: Is there evidence that the earth is round?
<bot>: Yes, there is evidence that the Earth is round. The Earth has been mapped using satellites and other technologies, and it is found to be spherical in shape. Additionally, scientists have calculated the circumference of the Earth by measuring the distance between two points on the surface of the planet. These measurements show that the Earth's circumference is approximately 40,075 km (24,901 miles).