Live Birth. After mating, females are pregnant for about seven months -- usually between 205 and 217 days. Instead of having a litter of several small babies like many mammals do, porcupines have one large baby. A baby weighs about a pound, typically ranging from 14 to 18 ounces. Their quills are soft when they're born, but the quills harden within an hour.
Fuel Cost. The cost of wood pellet fuel is usually given in dollars per ton; the average price of the fuel is typically around $250 per ton. The cost of a cord of wood, the fuel burned by a conventional wood stove, is around $200. The average home uses about 7.3 tons of pellet fuel or 6.5 cords of wood per season.
Pellet grills take 10-15 minutes to heat up, which is about same as the average gas grill. Most retailers that carry pellets also sell an optional but very useful temperature control unit.ellet grills, on the average, range from around $400 for a small and basic unit all the way up to $2,000 for a bigger one with all the features.