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Humans (1) much in common with other life forms on Earth. (2) the very first life
forms appeared, all living things have (3) desperately struggling to survive the harsh and changing
conditions of our planet. This has (4) adapting to new situations and, in many cases, has
(5) to either evolution or extinction. We are (6) alone in making use of the world
around us (birds use twigs to build nests, for example) or in being particularly skilful (spiders make intricate
webs). Where we (7) differ from other life forms, however, (8) in our ability to
record, and learn from, our collective history. In this, it (9) that we (10) unique.
(11) is still much mankind (12) not know about the earliest humans, of course, but
we are increasingly (13) a species with detailed knowledge about our past. The more we learn, the
better (14) our chances of survival in the future. It must also be recognised, however, that we are
also the only species on Earth which (15) managed to create the means to destroy the planet we
live on.
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