Speaking of Noah's Ark . . . . Here is something that I put together that really burns their asses when they see it.

Maybe christians just are not very good at math . . . .
. The largest study of life forms ever recently estimated that there are 1 TRILLION species on Earth.
[sciencealert.com]
. OK, so there are about 1,000,000,000,000 species on the earth. If 90% of these are insects, and we consider them to be all very small, (which we know they are not), we could say that each pair, in order to fit on the "ARK" would need 4 square inches for two of them, plus their food for more than 40 days (Actually I think it was about a year, but we will go with just 40 days just to give the bible thumpers a chance, it supposedly rained for 40 days). Since 12 inches squared = 144 cubic inches, 144 cubic inches / 4 cubic inches = 36 per square foot. We know that, the insect population is about 80 - 90% of the entire 1,000,000,000,000 species, so making a conservative estimate, we will say it is 90%. 1,000,000,000,000 90% = 900,000,000,000 insects. 900,000,000,000 insects / 36 insect per square foot = 25,000,000,000 square foot needed to house all of these insects, and their food. Now the animals. 1,000,000,000,000 10% = 100,000,000,000 animals. We will again be conservative, and say that each animal requires only 3 cubic feet living space and three cubic foot for 40 days supply of food. 9 cubic feet total for each pair of species. They say the average size is actually that of a sheep, which would be more like 9 cubic feet for the two sheep alone. So, 100,000,000,000 animals x 9 cubic feet = 900,000,000,000 cubic feet required to house them. Now we will take the total cubic feet required for the insects and the total for the animals and add them together. 25,000,000,000 square feet + 900,000,000,000 square feet = 925,000,000,000 square feet needed on the whole "ark". (We will not even count the space needed for the humans, breathing space for all of the animals, and space needed for the structure of the "ark" itself.)
Now the dimensions of the "ark" are well known, as listed in the 2000 year-old book of bull shit. The length of the ark - 300 cubits, its breadth 50 cubits, and its height 30 cubits". This is equivalent to a length of 450 feet, a breadth of 75 feet and a height of 44 feet (assuming an 18" cubit); or 500 Feet, 83 feet and 49 feet (if it was the Egyptian 20" cubit). (We will use the larger size, just to give the bible thumpers a better chance) 500 x 83 x 49 gives 2,033,500 cubic feet. But wait, we needed 925,000,000,000 cubic feet! That is 454,880 times more space needed than the "ark" provided! And, we did not calculate for breathing space, space for humans, food for the humans or animals, or internal structure of the ark itself! So, please tell me, bible thumpers, what did "god" do, shrink the fucking animals?
If the Earth were flooded for a full year, as the bible claims, they would have had to pack up all of the plants too, because they would never have survived submersed under water and without sunlight for a year, since sunlight only penetrates ocean water to a depth of less than half a mile . . . . If the flood killed all of the animals that were not on the ark, and they were later fossilized, why is it that we do not see all of the same types of animals in one fossilized layer, when we instead see them separated based on how long ago they existed? If there are one trillion species on earth, how could one family feed that many animals in one day?

[talkorigins.org]

To all the supporters of the biblical story of Noah and the ark . . . . . So . . . Where in the fuck did they get the penguins, Tasmanian devils, the pink land iguanas, the tarsiers, the Javan rhinoceros, and the kangaroos? I'm sure they traveled all the way to the Galapogos islands, Indonesia, Southeast Asia, and all of the other places too, huh? They likely did not know that most of these animals even existed when they wrote their 2000 year-old book of bull shit. What, god parachuted them from the sky onto the ark or something? And then fucking returned them to the other side of the Earth? You'll have to think up a serious bull shit story for that one . . . . Or maybe for once you will accept the fact that you have been bullshitted way beyond the pale of believability. Stop supporting and feeding the parasitic child molesters with your alms and naiveté.
[treehugger.com]