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7 de feb. de 2013 · Our World: What Is a Solar System? Find out why one amateur astronomer created an amazing graphic of the 88 largest objects in our solar system. Learn just what makes up a solar system and find out how we classify the thousands of objects in our own solar system. Since the production of this video New Horizons has reached, and is providing ...
22 de ago. de 2020 · ナショナルジオグラフィックのワークブック『Our World』はグローバル視点を取り入れた英語教育におすすめ！. 最近フォニックスを終え、長男はNational Geographic社の『Our World』というテキストをやり始めることにしました。. 次に何のテキストに取り組むか ...
Population growth is one of the most important topics we cover at Our World in Data. For most of human history, the global population was a tiny fraction of what it is today. Over the last few centuries, the human population has gone through an extraordinary change. In 1800, there were one billion people. Today there are more than 8 billion of us.
In 2021, the global average life expectancy was just over 70 years. This is an astonishing fact – because just two hundred years ago, it was less than half. This was the case for all world regions: in 1800, no region had a life expectancy higher than 40 years. The average life expectancy has risen steadily and significantly across all regions. 1.
Most viewed. Latest World news news, comment and analysis from the Guardian, the world's leading liberal voice.
This is what the World Health Organization (WHO) considers the "expected sex ratio at birth”, which means that, in the absence of gender discrimination or interference, it’s expected that there would be around 105 boys born per 100 girls — although this can range from around 103 to 107 boys per 100 girls.
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