noun

a fossil of an ancient type of mollusk (=sea animal with a soft body and a hard shell)

adjective

relating to the time about 350 million years ago when decaying forests began to form coal underground

noun

one of the people who lived thousands of years ago mainly in caves

noun

the period from about 144 to 65 million years ago when rock containing chalk was formed

noun

a member of an ancient people who lived in Europe from 30,000 to 50,000 years ago

the ancient time when the Earth and the first people were created, according to some Australian Aborigines

noun

one of the very long periods that prehistoric time is divided into

noun

an animal or plant, or a part of one, that lived many thousands of years ago and is preserved in rock or as a piece of rock

verb

to become a fossil by being preserved in rock for thousands or millions of years, or to preserve something in this way

adjective

preserved in rock or as rock

adjective

created by glaciers millions of years ago

noun

a human, or an ancient creature from which humans developed

noun

an ancient creature from which humans developed that was able to walk upright

noun

a period of time thousands of years ago when large areas of the Earth were covered in ice

adjective

relating to the time about 175 million years ago when dinosaurs lived

noun

an early human believed to have existed long ago that was half ape and half human

noun

a member of an ancient people who lived in Europe from 35,000 to 130,000 years ago

noun

a member of the neanderthal people

adjective

the Neolithic period of history began around 10,000 b.c., when humans began to make stone tools, grow their food, and live in permanent communities

the British spelling of paleontology

adjective

relating to the time when humans first started to make tools out of stone

noun

the study of the history of the Earth using fossils (=ancient plants, bones, shells etc. preserved in rocks)

adjective

relating to the period of time before history was first written down

noun

the period of time before written history, or the study of this period

another spelling of primeval

adjective

relating to the period when the universe or the Earth first began to exist

adjective

relating to a very early stage in the development of humans, animals, or plants

adjective

formed when the Earth or universe began

noun

someone who lived in a cave thousands of years ago

adjective

noun

adverb

adverb