This game is played with a deck of 32 cards. Each features information on a different prehistoric animal. This information has nothing to do with gameplay, however -- all that really matters is that each card has a number from 1 through 8 in the upper left corner. Players are trying to collect sets of four cards with the same number. Each turn, the current player asks opponents for cards of a given number, Go Fish style. Players are required to hand over requested cards if they have them, but as soon as a request cannot be fulfilled, a new player's turn begins. When all cards have been played in quartets, the player with the most completed sets wins. - BoardGameGeek