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"That is very exciting because a lot of interesting things happened with the Earth's climate prior to 800,000 years ago that we currently cannot study in the ice-core record."The work was supported by two collaborative awards 08389031 made by the Division of Polar Programs in NSF's Geosciences Directorate and by the U. Buizert, whose work also was supported in part by the National Oceanic and Atmospheric Administration, said reconstructing the Earth's climate back to 1.5 million years is important because a shift in the frequency of ice ages took place in what is known as the Middle Pleistocene transition.

The Earth is thought to have shifted in and out of ice ages every 100,000 years or so during the past 800,000 years, but there is evidence that such a shift took place every 40,000 years prior to that time."Why was there a transition from a 40,000-year cycle to a 100,000-year cycle? "Some people believe a change in the level of atmospheric carbon dioxide may have played a role.

A new method that determines the age of a document in a less invasive way than other techniques and is also able to date documents up to five years old.

In fact, the dating of documents is a key area in the field of forensic science.

These are often very tricky questions to answer and frequently arise in judicial contexts.

The use of a radiometric-Krypton-dating technique on ice from Antarctica's Taylor Glacier was documented in a paper published this week in the .But this technique is also able to overcome other stumbling blocks relating to the amount of ink deposited when writing and the type of paper used, as these variables hamper the dating of a document by means of traditional methods.What is more, the new technique reduces the number of punctures needed to analyse the writing on a document to just one.S., over 100 teens shared with us their personal experiences with social media and romantic relationships. During the focus groups, technology – and especially social media – often was described as an integral part of the courting process for teens.These are some of the key themes and responses we heard during these data-gathering sessions. And I met a girl on there and she lived up in [location]. Half of all teens (50%) have let someone know they were interested in them romantically by friending them on Facebook or another social media site, and 47% have expressed their attraction by liking, commenting or otherwise interacting with that person on social media.

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