So as to better see predators sneaking up on them.
some did
No meat eating dinosaurs had real horns on their heads. Some, however, had horn-like headcrests above their eyes or on the nose. These include Carnotaurus and Ceratosaurus.
some heads are vis versa
Birds can often be seen moving their heads in order to change their visual relationship to something. Some birds' eyes are placed much nearer the sides of the head than in humans, giving the birds a greater overall field of view.
Scallops typically have 60 to 100 eyes. Scallops have more eyes than spiders, which usually have six or eight simple eyes, some on the top of their heads, and some in the front..
Their eyes are located on the top and the to side of their heads. How the eyes look depends on the species. Some have natural looking irises, some have brighter colored irises.
Bipedal dinosaurs include all theropods. Also, some small plant eating dinosaurs were bipedal, such as Leallynosaura.
A coin with heads or tails on both sides are novelty coins manufactured by individuals or companies. They have no numismatic value although some persons collect them and the value is determined by the buyer and the seller of each coin.
Some animals have almost invisible hole on the side of their heads. Other animals have ears as you know. Frogs and Toads, like your category suggests, have little holes in the sides of their heads.
thats really depends. Some moms wont but some moms have eyes in the back of their heads and the ears of a hawk.
Dinosaurs never flew dinosaurs were land reptiles although some dinosaurs could swim
There is merit to be able to see what's happening in front of you and where you're going, so it isn't a stretch to think that eyes located in better positions were selected for. Not all animals have eyes in front of their heads, however, some animals that live under water and who look out every now and then with minimal likelihood of being seen themselves have eyes on top of their heads, such as frogs and crocodiles.