How did the dinosaurs fit in the ark?
Maybe they weren't on the ark and that's why they went extinct.
They were hatchlings perhaps?
They were babies
Hey, wait a minute, wasn't there humans and dinos in that movie "10 million years BC"(sarc)
They were baby dinosaurs.
They were miniature dinosaurs - like minature Dobermans and Rotweilers.
How did they fit?
Remember, GOD said this to Noah:
Genesis 6:19 And of every living thing of all flesh, two of every SORT shalt thou bring into the ark, to keep them alive with thee; they shall be male and female.
Perhaps Noah thought, "These lizard's are SORT of like dinosaurs, I'll take them. Besides, have you ever SMELLED a wet dino? WHEW!!!"
Reptiles grow their whole life and start out much much smaller than the mammal infant to adult ratio.
Do you know how big the Ark was? If so, your question is not a question it is simply a foolish statement, if not, go to the book of Genesis and bear in mind that a cubit is either 18 inches or 22 inches.
Ken Ham (Creation Institute) addressed this issue very well. The dinosaurs that came from small eggs, needed lots of time to grow (hundreds of years) into the giants we know through the fossils right now. Therefore to fit the dinosaurs with all the other creatures, he believes that the young were taken on board by "Sevens" (for Clean Animals) and "Twos" (for unclean) as the record states.
Ken also said that he didn't have to bring every type of dog into the ark, just a set that had the genes to bring out all the variety we see today.
Thus if the young of family types were brought on board, they would not consume as much space as the giants.
Note: Other than Animals brought into the Ark before the flood, the condition of man is also known "The thoughts of man was of only evil continuously". After the flood wars and evil continues but mans longevity is severely declined.