Stomach "mouth". The words "gastro-" and "gastric" (meaning related to the stomach) are both derived from the Greek word "gaster" (, meaning "belly"). Although the precise shape and size of the stomach varies widely among different vertebrates, the relative positions of the oesophageal and duodenal openings remain relatively constant. As a result, the organ always curves somewhat to the left before curving back to meet the pyloric sphincter. However, lampreys, hagfishes, chimaeras, lungfishes, and some teleost fish have no stomach at all, with the oesophagus opening directly into the anus. These animals all consume diets that either require little storage of
The Trouble with Atheism matter of choosing something for which there is no scientific proof either way". He argues that adhering to both religious supernaturalism and scientific naturalism is not contradictory, but a "balance" of the "very essence of what it is to be human". Based on arguments for God such as the fine-tuned universe argument, and on a lack of a conclusive understanding of pre-Big Bang physics, Liddle states that "the true scientific position, of course, is that there may be a God, and there may not be a God". Liddle identifies this position as agnostic, which he distinguishes from the "zealous" atheism