Trade and trave
Hearsay
Data
Someone who studies the planet would be called a Geologist. Someone who studies Space would be called an astronaimist. Both work together to gather information about earth.
UMM
Chromosome pairs that contain matching information are called "homologous".
Information gathered by someone who did not take part or witness is called second hand information.
Pieces of information gathered through observation are called observations or data.
Evidence
Evidence
Evidence
Evidence
Information that we obtain by means of our senses is called observation.
data
Evidence
Data.
data
Answer They sometimes can be called an expert, a witness, or an expert witness.