Those who doubt the veracity of the Bible say that eight people could NEVER have done all the work needed to maintain a ship as big as Noah's Ark. In particular, they scuff at the idea that, given their sheer number, the feeding of animals would be an impossible task on the ship. The TRUTH is that most of them would need little if any care on the ship. This vessel used self-cleaning, self-feeding and self-watering technologies.
The above picture shows a 1/12th scale model of a mechanism that could have been used for the feeding of animals on the Ark. Note that the mechanism uses a floor made of mesh which is slanted downward to allow waste to simply flow toward a gutter. Once manure from the animals is in this area it can either be allowed to dry or made into compost or be removed to outside the ship through a trough which is slanted that leads to the outside. Humans would not have to directly handle the waste.
The loading of food for the feeding of animals is accomplished through food chutes located on either side of the cage. This would effectively enable them to fed themselves. Enough food could be placed inside the chutes to last the duration of the flood until dry land again appeared on the earth.
Water could be brought to animals penned on the ship via pipes that fed into troughs or bowls. Water itself could be collected through a water collection system or could have been pre-loaded on the ark. Pipes were commonly made in this period of clay, bamboo or other materials. An eight person crew on Noah's Ark could have fairly easily cared and insured the feeding of the less than 40,000 animals it held. Data from husbandry studies have shown that they would even have had time to keep the Bible Sabbath.
After the floodwaters subsided and Noah left the ark, he and his family (and all humanity, by extension) were promised that all animals would have a natural fear of them (Genesis 9:2). The man whom God inspired to build a one-of-a-kind ship lived 350 years after the flood for a total lifespan of 950 years. His age, at death, makes him the third oldest human in world history. The longest lifespan goes to Methusaleh, who lived 969 years. The second longest life goes to Jared (Methusaleh's grandfather), who lived 962 years.
Noah represented the tenth generation of humans since God created Adam about 1,050 years prior to his birth. He is directly referenced, by name, at least fifty times in the King James Old Testament and three times in the New Testament (in the books of Hebrews, 1Peter and 2Peter). A series of pseudepigraphic (meaning falsely written) works, mainly of Jewish origin, appeared during the period between 210 B.C. and 200 A.D. One of these writings is entitled the Book of Noah.
God used Noah, along with Job and Daniel, as an example of righteousness (Ezekiel 14:14, 20). How righteous was this man? He was willing to TRUST God and sail a GIANT boat, for several months, that had no rudder or sail!