Isotropy and anisotropy: When a material is attacked by a liquid or vapor etchant, it is removed isotropically (uniformly in. all directions) or anisotropic etching (uniformity in vertical direction).
Some Questions Do Remain: 1  If the Earth was flat, we could travel to the place where the Earth and sky met. But we canât. 2  If the Earth was flat, we could reach the place where we could reach out and touch the Sun. But we canât. 3  If the Earth was flat, we could fall off the horizon. But we donâ 4 t. If the Earth was flat, it would simply fall.
Members of the Flat Earth Society claim to believe the Earth is flat. Walking around on the planet's surface, it looks andfeels flat, so they deem all evidence to the contrary, such as satellite photos of Earth as a sphere, to be fabrications of a round Earth conspiracy orchestrated by NASA and other government agencies.