81/ At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth.
82/ A thimbleful of a neutron star would weigh over 100 million tons.
83/ The risk of being struck by a falling meteorite for a human is one occurrence every 9,300 years.
84/ The driest inhabited place in the world is Aswan, Egypt where the annual average rainfall is .02 inches.
85/ The deepest part of any ocean in the world is the Mariana trench in the Pacific with a depth of 35,797 feet.
86/ The largest meteorite craters in the world are in Sudbury, Ontario, Canada and in Vredefort, South Africa.
87/ The largest desert in the world, the Sahara, is 3,500,000 square miles.
88/ The largest dinosaur ever discovered was Seismosaurus who was over 100 feet long and weighed up to 80 tonnes.
89/ The African Elephant gestates for 22 months.
90/ The short-nosed Bandicoot has a gestation period of only 12 days.