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Earth

Population

Agricultural advances caused the world’s population to grow from 170 million during the Roman period 2,000 years ago to 900 million in 1800. By 1900… Read More »Population

Humans

The Earth was formed about 4 billion years ago, with the first modern humans (Homo sapiens) only evolving between 200,000 and 100,000 years ago. If… Read More »Humans

Pollution

The environmental impact of human beings has grown in scale, become more rapid, and changed in character. Whereas we once transformed locales or regions, today… Read More »Pollution

Evolution

Evolution is the process by which life has developed on Earth; the species that exist today are the product of evolution. It is a process… Read More »Evolution