National Geographic Learning - Catalogue 2018

NGL-2018_Catalogue_Digital

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Practical Grammar 92 First English Grammar 92 Real English Grammar 92 Grammar with Laughter 92 Instant Grammar Lessons 92 Grammar Clips 92 Grammar Explorer 93 Grammar in Context, Sixth Edition 94 The Heinle Picture Dictionary, Second Edition 95 91 Dictionaries, Grammar & Language The moon is Earth's only natural satellite and the only extra-terrestrial body humans have visited. With gravity six times less strong of that on Earth, astronauts can take giant leaps on its surface as if weightless. Unlike Earth, the moon doesn't have an atmosphere, however, water has been found at both poles - deposited from comets impacting onto its surface. FACT

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