Scientists learn a few different things. Scientists learn new things very day.
Historical records of temperature and climateSatellite measurementsComputer modelsWeather chartsPeer experiments
Ice cores are useful for scientists who want to learn about the climate in Antarctica thousands of years ago.
an antohometer
Scientists want to learn about ocean currents because the currents affect Earth's climate and atmosphere and act as conveyor belts.
The layers in the soil can give a fingerprint of the climate.
The climate at the time the fossile was preserved. :)
Yes
why are you searching it up? you should have known
so they can learn more things about it.
why you cant see them
By looking at the air trapped inside bubbles, fossils, and tree rings.