800 Degrees

Jeffrey Sachs, Director of the Earth Institute has a mission: he wants to keep the world temperature from rising by more than 2c before 2050. Beyond these extra 2c, the Earth is bound to experience climate-caused disasters. How can scientists organize to influence governments around the globe?

Getting into the nation's most competitive universities requires more than a good SAT score—it requires a perfect score. Students taking the new SAT need this updated edition of Perfect 800: SAT Math, which includes 200+ problems required to master the new SAT. Covering areas including arithmetic concepts, algebra, geometry, probability, and more, the book offers exposure to a wide range of degrees of difficulty in a holistic approach that allows students to experience the "real thing," including the impact of time constraints on their performance.

Whether it's a romantic getaway to the breathtaking canyons of Mars or the ultimate vacation in Jupiter's magnetic field, National Geographic Channel brings you the ultimate in adventure travel, but it is not for the faint-hearted.

Whether it's a romantic getaway to the breathtaking canyons of Mars or the ultimate vacation in Jupiter's magnetic field, National Geographic Channel brings you the ultimate in adventure travel, but it is not for the faint-hearted. Today's super space traveller must endure drastic climates that shift from 450 degrees celsius in the sun to minus 170 celsius in the shade, crushing gravity, acid smog, and blistering radiation. From Jupiter's churning red eye to Saturn's glittering rings, the sights are out of this world. Blast-off with A Traveller's Guide to The Planets, the ultimate travel guide to the Solar System.