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Dinosaurs and mammals evolved from two separate branches of reptiles. Mammals evolved from synapisid reptiles (all of which are not extinct) while dinosaurs along with the modern branches of reptiles evolved from sauropsids. So dinosaurs are more closely related to modern reptiles than they are to mammals. In more recent years scientist tend to agree that birds are in fact a surviving branch of dinosaurs.
What else can I help you with?
Were there other mammals with dinosaurs?
There were mammals living alongside the dinosaurs, but the dinosaurs were not mammals.
Who has lived longer on earth so far dinosaurs or mammals?
Mammals and dinosaurs started about the same time and mammals are still here, so ... Mammals! (Unless you count birds as dinosaurs, in which case it's a tie). One of the mysteries of evolution is why the dinosaurs came to dominate the mammals in the first place.
Are dinosaurs the oldest mammals?
No. Dinosaurs were not mammals. They were more closely related to birds and modern reptiles than they were to mammals.
Do you believe that dinosaurs were ever mammals?
No. Dinosaurs are currently considered reptiles and are not related to mammals.
Are dinosaur birds mammals?
Birds are now classed as dinosaurs, but most dinosaurs were not birds. Neither dinosaurs nor birds are mammals.
Who appeared in fossils first dinosaurs or mammals?
Dinosaurs first appeared shortly before mammals did.
Is it true that mammals cohabited with the dinosaurs?
Yes. Mammals were around through most of the time that dinosaurs were.
Did mammals evolve from dinosaurs?
No. Mammals evolved from synapsid reptiles, a group not closely related to dinosaurs. Dinosaurs are more closely related to modern reptiles and birds than they are to mammals.
Are humans small dinosaurs?
no dinosaurs were reptiles and we are mammals.
Which lived on earth longer mammals or dinosaurs?
Mammals.
Are parasaurolophus mammals?
No they are dinosaurs
Are dinosaurs more closely related to amphibians or mammals?
Dinosaurs are more closely related to mammals. Both mammals and dinosaurs share a reptilian ancestor that they don't share with amphibians.
