A Less Green and Pleasant Land: Our Threatened Wildlife by Professor Norman Maclean, Chris Packham

By Professor Norman Maclean, Chris Packham

Disentangling the proof from the hype, this 'Domesday booklet' of the British and Irish nation-state bargains a definitive and up to date survey of the country of our natural world this day. Norman Maclean, editor of the bestselling Silent summer time, examines the newest findings of england and Ireland's most sensible natural world specialists and translates them for a much wider viewers. each one bankruptcy offers trustworthy estimates of animal populations, exhibiting which species are thriving and that are in decline. The e-book additionally considers the consequences of weather switch on our natural world and the way human inhabitants progress is influencing its improvement. superbly illustrated with color plates and wooden engravings all through, this available and well timed learn unearths simply how quickly our geographical region and its natural world are altering, why we must always be troubled, and what we will be able to do approximately it.

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Extra resources for A Less Green and Pleasant Land: Our Threatened Wildlife

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DEVELOPMENT OF WATER ON EARTH Free water is essential to life as we know it, yet it was probably not present in the earliest life of the planet. Some was locked up in materials forming the Earth and much may have been brought to Earth by comets. It remains unclear how hot early Earth was, and some evidence points to early oceans co-existing with surface temperatures of 230°C, the dense atmosphere 24 | A LESS GREEN AND PLEASANT LAND preventing complete vaporisation. A period of ocean cooling then followed, and, as we shall see, this helped to favour the evolution of early life.

The layer up to about 20 km from the Earth’s surface is called the troposphere (this is the layer in which aircraft fly), the next 30 km is the stratosphere (only entered from Earth by exploratory weather balloons), then up to 85–90 km we have the mesosphere (this is the layer through which visible meteors light up). Further out is the thermosphere, up to approximately 600 km from our planet, and lastly the extremely thin and almost gasfree exosphere, which extends up to 10 000 km from Earth. The familiar ozone layer lies within the stratosphere, while our excitement at viewing the auroras, which consist of particles invading our atmosphere from solar eruptions, is due to their lighting up in the thermosphere.

The Mediterranean Sea itself would have been dry 6 mya, and by 2 mya the hot dry climate held sway. 2 mya, involved passage from Africa via Egypt. 7 mya. Remember that these hominids were a mixture of Neanderthals and Homo sapiens, the last Neanderthals being recorded in Europe up to about 30 000 years ago, although by then there is some evidence that they had reached the Arctic Circle. Some anthropologists now suggest interbreeding between Neanderthals and Homo sapiens, to form a Cro-Magnon population of early hominids.

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