Wild animals roam freely for long hours because they have larger areas. It depends on the species of animal and its needs. If it is a domestic animal or wild animal in the zoo, the time animals stay out of their cages will be decided based on factors such as specific routines and care given by the caretakers of the animals.&n...

• Octopus blood is blue because it contains a copper-rich protein called hemocyanin that carries oxygen in the blood. In contrast, human blood is red in color because it contains iron-rich hemoglobin.

• An octopus has three hearts. The two hearts pump blood through the gills, where oxygen is absorbed from the water. A third he...

• No, dinosaurs did not produce fossil fuels like oil. Fossil fuels originate from leftovers of ancient plants and tiny animals that existed millions of years before. Over the years, these organic components were buried behind several layers of sand and exposed to extremes of pressure and heat, resulting in the fossil fuels we use nowa...

The Megalodon, a prehistoric giant shark, is believed to have gone extinct around 2.6 million years ago. There are several factors that likely contributed to its extinction:

1. Environmental Changes: 

In that ancient time, the earth became so cold that when ocean temperatures dropped, the distribution and abundance of marine li...