If we were to go by Georges Lemaître hypothesis, then our universe began with the big bang, and is still existing till now that are reading. It has been home to millions of creature species and is still home to so many species. It has harbored so a life creatures that we do not know, some that we know, and a lot the we just think we know.
Earth is home to about 1.5 million eukaryotic known species but it is home to millions more that we do not even know about because yearly, we add over 10,000 new species that we discover. If we have this amount of species in our world, then think of how many millions of species would have lived in this world before the first homo-sapiens.
We have been able to look at fossil remains of animals from our pasts, and these fossils include bones and shells, not forgetting imprints, and impressions from those animals. With fossil records, we are able to see some of these animals. When it comes to fossilazation, the organism dies, begin to decay, and must a have survived millions of years before resurfacing. This fossil are then discovered and preserved before the they are dissolved.
One of those animals are the Dinosaurs, which lived for millions of years and they are often animated for children excitement but truly, they existed at some point in time. Within the last 200 years, over 10 thousands of fossils have been seen from over 1000 dinosaur species. Each year, lots of dinosaur species fossil are seen and it has helped us learn a lot of things about them.
It is no doubt that a lot of species are lost forever as a result of their environment such as in the case where the animal remains is being eaten by another animal, and bone quickly dissolved due to the soil acidity. Also, animals that lived in the jungle millions are years ago are very difficult to see making it look non-existence. The fossils of animals that are found such as dinosaurs are usually teeth or bones, and are usually found in fragment. If we are to go by this, it means that so many boneless or shell-less animals that existed millions of years ago cannot be found.
Fossils, particularly bones and teeth, are crucial for reconstructing the appearance and behaviors of these ancient creatures. For example, the study of Sinosauropteryx prima bones revealed the presence of striped tails, shedding light on the appearance of these dinosaurs
Our understanding of Earth's biological history is constantly evolving, driven by ongoing discoveries and research. From the origins of the universe to the present day, the journey of life on Earth is a story of extraordinary diversity and complexity. As we continue to uncover fossils and study them, we gain invaluable insights into the lives of creatures that once roamed our planet, enriching our understanding of the natural world and our place within it.
Reference
https://phys.org/news/2015-12-big-theory.html
https://sites.google.com/view/sources-mysteries-of-the-past/
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001127
https://www.amnh.org/dinosaurs/dinosaur-bones
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001130
https://www.usgs.gov/faqs/when-did-dinosaurs-become-extinct
https://www.nature.com/articles/nature09678
https://www.scientificamerican.com/article/dinosaur-discoveries-are-booming/
