The National SAFEKIDS Campaign recommends that no child under the age of 12 be left at home alone. However, consider a child's age and maturity level. For example, if a child is extremely impulsive, it might be best to wait until he or she is older than 12.
Did people and dinosaurs live at the same time? No! After the dinosaurs died out, nearly 65 million years passed before people appeared on Earth. However, small mammals (including shrew-sized primates) were alive at the time of the dinosaurs.
Well, their whole period of existence was called the MESOZOIC period. The earliest dinosaurs such as Coelophysis, a predator, appeared in the sub-period called the TRIASSIC, fâ¦rom around 225 million BC to 190 million BC. By the way, Coelophysis was from the late Triassic.