Glutamic acid is a natural constituent of many fermented or aged foods, including soy sauce, fermented bean paste, and cheese, and is also a component of hydrolyzed protein such as yeast extract. The sodium salt of glutamic acid, monosodium glutamate (MSG), is a widely used additive in the food industry.
Paleontologistâs estimate that only a small percentage of the dinosaurs that ever lived have been or will be found as fossils, because their bodies simply decayed. The word fossil comes from the Latin word fossils, which means, âdug upâ. Most fossils are excavated from sedimentary rock layers. Sedimentary rock is rock that has formed from materials like sand, mud, and small pieces of rock. Over long periods of time, these small pieces of debris are squeezed and are buried under more and more layers of sediment that piles up on top of it.
Some other trace fossils include coprolites (fossilized dung) tooth marks on bones or wood, and nests. Sediment can even preserve plant life. Plants can make impressions in hardening sediment or become petrified wood after going through much the same process as fossilized dinosaur bones do.s the water penetrates the dinosaur's bones, some of these minerals precipitate into their microscopic pores. As this process continues, the bone becomes more and more rocklike. It's like filling a sponge with glue -- the sponge's physical structure stays the same, and the pores and pockets within it fill up.