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By mapping the loess and the trail of rock debris left by the glaciers, scientists determined that the ice sheets had once stretched down over the familiar bowls of the Great Lakes in North America and across the British Isles and Scandinavia.Thick glaciers, far larger than those that currently cap the mountain peaks, covered the Alps.Within the bands of tree rings lie records of relative seasonal rainfall and used during photosynthesis.Another recorder of climate is oceanic sediment, which contains a layered time history of faunal shells that lived in overlying surface and deep waters.Trees are a ubiquitous form of plant life on planet Earth.They are the lungs of the world, breathing in carbon dioxide and breathing out the oxygen on which animal life depends.Analysis of the physical and chemical properties of an ice core can reveal past variations in climate ranging from seasons to hundreds of thousands of years.Ice core records can be used to reconstruct temperature, atmospheric circulation strength, precipitation, ocean volume, atmospheric dust, volcanic eruptions, solar variability, marine biological productivity, sea ice and desert extent, and forest fires.

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They are used for decoration in parks and gardens all over the world.

They come in all shapes and sizes from the smallest saplings up to the colossal redwoods of North America - it could be said that we take them for granted, yet they are vital to teaching us about many aspects of our past. Before then, tree ancestors may have looked slightly tree-like but they were not trees in any proper sense.

The dawn of the age of true trees came with the evolution of wood in the late Devonian period.

That Western and Eastern tropical Pacific El Niño-Southern Oscillation (ENSO) records differ is an important piece of the puzzle for understanding regional and global climate change.

Input of anthropogenic CO The biogeochemical cycling of carbon on Earth has undergone marked changes over the past glacial-to-interglacial period, and nearly all of these changes have occurred prior to scientific observation.

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This week the Ohio House of Representatives unanimously approved a bill ostensibly aimed at fighting "human trafficking" that makes it a crime to "solicit" a legal act: sex with someone who is 16 or 17 years old. Since there is no requirement that money change hands, this provision criminalizes ordinary sexual propositions if one person is 16 or 17 and the other is at least four years older when it is the older person who makes the suggestion, .

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