The Husk will spawn instead of a zombie (most of the time) in Desert biomes. This mob is one of three biome-specific mobs added in this patch (Stray and Polar Bear, being the other two).
Axis Tilt is Critical for Life. The tilt of the Earth's spin axis with respect to the plane of its orbit about the sun (the ecliptic plane) is important for a habitable Earth. The Earth's spin axis is tilted 23.5Â° with respect to the ecliptic, giving moderate seasons and preventing temperature extremes anywhere on the planet. This illustration, patterned after Ward and Brownlee, summarizes the effects of different tilt angles with respect to the ecliptic plane.
It is my belief that the tilt of the earth's axis has changed and the cause of the axis change is the melting of the polar ice caps. As the land ice melts at the south pole, the weight of that melted ice is distributed in the oceans, thus reducing the weight at the poles.