What would happen if the earth had no tilt?

With no tilt, this change in Earth-Sun distance during the year would produce a slight impact on the weather pattern. It must be emphasized the impact would be small since the Earth-Sun distance is not significantly different during the year (91.4 million miles in January compared to 91.5 million miles in July). read more

Without Earth's tilt, humanity would be in a sorry state. Forget modern technology, the steam engine, or sliced bread. In a world without seasons, there wouldn't even be wheat. read more

Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun. Changes in axial tilt affect the distribution of solar radiation received at the earth’s surface. read more