What have scientists learned from fossils that have been discovered since darwin's time?

Answer AND Explanation:

By examining fossils, biologists have been able to recreate the evolutionary history of the various organisms that have inhabited the earth. From fossil evidence, scientists have found that the first organisms evolved in the sea at about 3.6 billion years ago. These are unicellular organisms that resembled present day bacteria and blue-green algae.

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: