Por que os Dinossauros eram Grandes? Humanos podem Evoluir para Gigantes?

Fontes:

https://www.livescience.com/18314-dinosaurs-grew-huge.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Livesciencecom+%28LiveScience.com+Science+Headline+Feed%29&utm_content=Google+Reader

https://www.livescience.com/g00/13703-giant-dinosaurs-sauropods-museum-evolution-size.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Livesciencecom+%28LiveScience.com+Science+Headline+Feed%29&utm_content=Google+Reader&i10c.encReferrer=aHR0cHM6Ly93d3cueW91dHViZS5jb20v&i10c.ua=1

https://www.mundodosanimais.pt/animais-pre-historicos/dinossauros-gigantismo/