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Why is the fossil record incomplete?

There are gaps in the fossil record because many early forms of life were soft-bodied. The soft parts of organisms do not form fossils well. This means there is little information about what these organisms looked like. Any traces of fossils that there may have been were likely destroyed by geological activity.

How are fossils formed step by step?

Stage 1: A dinosaur dies and is buried before the remains are completely destroyed. Stage 2: Over time, layers of sediment build up and press down on the buried remains. Stage 3: Dissolved minerals, transported by ground-waters in the sediment, fill tiny spaces in the bones.

What factors exposed the rock layers with the fossils in it?

We study Earth’s history by studying the record of past events that is preserved in the rocks. The layers of the rocks are the pages in our history book. Most of the rocks exposed at the surface of Earth are sedimentary–formed from particles of older rocks that have been broken apart by water or wind.

How many categories of fossils are there and what are they called?

There are four main types of fossils, all formed in a different way, which are conducive to preserving different types of organisms. These are mold fossils, cast fossils, trace fossils and true form fossils.

How old are coprolites?

Dinosaur coprolites have been dated back to the Cretaceous period (146–66 million years ago). The oldest known fossilised poo (from an animal) uncovered so far dates to the Early Cambrian period, more than 480 million years ago.

Do baby elephants eat their moms poop?

Many baby animals — including elephant and hippo calves — eat feces from their mothers or fellow herd members when they’re transitioning from drinking their mother’s milk to eating solid foods, Amaral said.

Why do gorillas eat poop?

Gorillas also engage in Coprophagia, They eat their own feces (poop), as well as the feces of other gorillas. This behavior may help to improve the used of vitamins or other nutrients made available by the gorillas re-eating of seeds.