Jannah Theme License is not validated, Go to the theme options page to validate the license, You need a single license for each domain name.
غير مصنف

How many animals have ever existed on Earth?

There are more than 8 billion humans on the planet, and although that’s a remarkable number, it’s just a fraction of the number of people who have ever lived and an even smaller slice of the total number of animals that have ever existed.

But how would scientists even go about estimating the total number of animals on Earth, let alone determining how many have ever existed on our planet throughout its history? And why bother?

اترك تعليقاً

لن يتم نشر عنوان بريدك الإلكتروني. الحقول الإلزامية مشار إليها بـ *

زر الذهاب إلى الأعلى