![]() ![]() ![]() But if we don't look after nature, nature can't look after us. This is the first time in Earth's history that a single species - humanity - has brought such disaster upon the natural world. Climate change is creating deserts and dead zones, and hunting is driving many species to the brink of extinction. Pollution has caused toxic air in our cities, and farming and logging have wreaked havoc on our forests. Our future depends on nature, but we are not doing enough to protect our life support system. ![]() ![]() Now we're wondering if you can help us.Įvery year, more people are reading our articles to learn about the challenges facing the natural world. or that it helped you learn something new. Evolution occurs automatically for survival and for millions of years it has been playing catch-up with our dynamic world. Earth was thought to exist in an optimal form.īut natural selection relies on the fact that the world is constantly changing. The ideas that mountains could rise, and climate and organisms could change didn't exist. That's where this theory fails.' Are we still evolving?įor millennia, the world was viewed as static. These animal's offspring would inherit longer necks as a result of their parents' efforts.Īdrian says, 'If you tried to stretch your neck for 10 minutes each morning, then you would probably end up with your neck being a few millimetres longer for a few years. In Lamarckian theory, giraffes stretch their necks to make them longer. It proposes that animals acquire characteristics based on use or disuse during their lives, rather than through hard-coded genetic changes. Lamarckism is a theory named after French naturalist Jean-Baptiste Lamarck (1744-1829). ![]()
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