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  1. How many humans have ever existed? New study has answer

    Apr 4, 2022 · How many humans have ever lived? In 2022, the world will likely hit a momentous milestone—a population of eight billion. Of course, this dramatic increase in the world’s human …

  2. How Long Have Humans Been on Earth? | Facts, Timeline & Early …

    Nov 5, 2019 · The Earth itself is 4.5 billion years old. Nonetheless, the six million years humans have been on Earth has allowed them to evolve, build tools, create civilizations, adapt to their …

  3. David Attenborough: The planet can’t cope with overpopulation

    Oct 9, 2018 · So, how many people is too many? Scientists are still undecided on the Earth’s "carrying capacity" - the maximum number of people it can support indefinitely - with estimates …

  4. World population just passed 8 billion: what you need to know

    Nov 16, 2022 · The number of people on Earth passed 8 billion this week, according to the United Nation's World Population Prospects 2022 report. Here's all you need to know about the global …

  5. This is how much of the Earth's surface humans have modified

    Oct 19, 2021 · Human impact on the Earth’s surface can take a number of different forms, including cities and towns, to natural systems modification.

  6. Why do we consume only a tiny fraction of the world's edible …

    Jan 15, 2016 · Scientists estimate that there are more than 400,000 species of plants on earth, at least half of which are edible for humans. Indeed, it is entirely possible that we are capable of …

  7. Mapping the extent of human impact on the Earth’s surface

    Dec 4, 2020 · Almost 95% of the Earth's surface has been modified by humans. Data scientist Hannah Ker has create a map which tracks five categories of human use of land - and the …

  8. This remarkable video shows how humans spread across the Earth …

    Feb 17, 2017 · Modern humans have been around for about 200,000 years, which isn't very long when you consider that the Earth is estimated to be around 4.7 billion years old. During most …

  9. Humans have caused surprising changes to the planet that will be ...

    Jul 21, 2017 · Humans have only been on Earth for a minute fraction of the time the planet has existed. Yet everywhere you look, we have left a trace of our presence.

  10. Explainer: What exactly is freshwater and is there enough of it?

    Oct 12, 2022 · Most of the water on Earth is saline, with freshwater making up just 3%. Nearly two-thirds of humans face water shortages at least one month a year - UN. Rising global …