The age of discovery is nowhere near ending when it comes to space exploration. In 2003, scientists discovered an object about three times farther away from Earth than Pluto is. The new discovery is called Sedna, named for
an Inuit goddess who created Arctic sea creatures. Scientists say that the name is fitting. Sedna's temperature is a
bone-chilling 400 degrees F (240 degress C) below zero.

Walking is not the most exciting form of exercise a person can take on for fitness. yet it is low impact and requires no fancy equipment. that makes walking a simple activity for those new to exercise. walking is less likely than other exercises to cause injury to leg tendons and muscles. all it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. of course, a person could increase the benefit of a workout by adding weights or speed walking. identify the main idea of this paragraph. walking is a difficult and safe exercise for beginners. walking is an easy and safe exercise for beginners. walking is a boring and dangerous form of exercise. walking is an exciting and very effective form of exercise.