Comprehensive Evolutionary Biology, Earth History, and Human Phylogeny

Petrified Fossil (Echte Versteinerung)

A fossil formed when the hard structures of an organism, such as calcareous shells or teeth, are gradually dissolved and replaced by mineral substances through chemical transformation without changing the original structural details.

Steinkern (Internal Cast)

A fossil cast formed when an organism's shell fills with sediment, the outer shell subsequently dissolves in acidic groundwater, and the hardened sedimentary infill preserves the internal surface anatomy of the original shell.

Mould (Abdruck)

A hollow negative cavity or impression left in sedimentary rock after an encased organism decomposes and dissolves entirely during rock lithification.

Trace Fossils (Spurenfossilien)

Geological evidence documenting biological activity, locomotion, or behavior—such as dinosaur footprints, trackways, and prehistoric worm burrows—rather than preserved physical body parts.

Carbonization (Inkohlung)

A preservation process occurring under high lithostatic pressure, high temperature, and anoxic conditions where volatile elements are expelled, leaving behind a thin carbon film detailing delicate structures like plant leaves or insect exoskeletons.

Stratigraphic Dating (Stratigraphische Altersbestimmung)

A relative dating method based on the law of superposition, where undisturbed deeper rock layers are older than the overlying strata, enabling chronological ordering of embedded fossils.

Index Fossils (Leitfossilien)

Readily identifiable fossil organisms characterized by a narrow geological lifespan, widespread global distribution, and high abundance (such as Paleozoic trilobites) used to date and correlate rock strata.

Radiocarbon Dating ($^{14}\text{C}$-Methode)

A radiometric absolute dating technique that calculates the chronological age of organic remnants by measuring the radioactive decay of carbon-14 ($^{14}\text{C}$) relative to its constant half-life.

Connecting Links (Brückentiere)

Transitional organisms exhibiting anatomical characteristics of two distinct taxonomic groups, demonstrating intermediate evolutionary stages between major lineages.

Archaeopteryx

A famous transitional fossil connecting reptiles and birds, possessing avian traits (flight feathers, avian skull) alongside ancestral reptilian features (jaw teeth, three clawed wing digits, and a long bony tail of approximately $40$ caudal vertebrae).

Living Fossils (Lebende Fossilien)

Extant species whose anatomical body plans and structures have remained virtually unchanged across millions of years of evolutionary history, such as the horseshoe crab, Ginkgo, and coelacanth (*Quastenflosser*).

Lamarckism

An evolutionary hypothesis proposed by Jean-Baptiste de Lamarck based on an organism's inner drive for perfection, the principle of use and disuse of organs, and the inheritance of acquired traits during an individual's lifetime.

Darwinism (Natural Selection)

Charles Darwin's evolutionary mechanism wherein overproduction of offspring and heritable phenotypic variation lead to a struggle for existence, resulting in differential survival and reproduction of better-adapted individuals.

Homologous Organs (Homologie)

Anatomical structures in divergent species that share an underlying structural architecture and common evolutionary ancestry, despite often serving different biological functions (e.g., the pentad