It was plenty of room
It was plenty of room
"For the sake of realism, imagine waiting at a railroad crossing while ten freight trains, each pulling 52 boxcars, move slowly by, one after another. That is how much space was available in the Ark, for its capacity was equivalent to 520 modern railroad stock cars. A barge of such gigantic size, with its thousands of built-in compartments (Gen. 6:14) would have been sufficiently large to carry two of every species of air-breathing animal in the world today (and doubtless the tendency toward taxonomic splitting has produced more “species” than can be justified in terms of Genesis “kinds”) on only half of its available deck space. The remaining space would have been occupied by Noah’s family, five additional representatives of each of the comparatively few kinds of animals acceptable for sacrifice, two each of the kinds that have become extinct since the Flood, and food for them all (Gen. 6:21) [1973, p. 23, emp. in orig.].
Whitcomb and Morris investigated the numbers of animals that would have been on the ark (using the highest possible estimates, and taxonomic figures provided by evolutionists), and showed that the biblical account can fit known scientific facts regarding these matters (1961, pp. 65-69). Their book, The Genesis Flood, was published in 1961. Thirty-five years later, John Woodmorappe expanded on their work, and produced what is likely the most exhaustive, well-researched feasibility study ever put into print dealing specifically with the ark’s construction and contents (1996). His data-based conclusions established beyond any doubt that the ark could do what it was designed to do. Since God was the Creator of all the animals, does it not make sense that He would know precisely how much room was needed for them on the ark?"
http://www.apologeticspress.org/apcontent.aspx?category=13&article=1413