By Chris Baraniuk. An extraordinary number of arrows dating from the Stone Age to the medieval period have melted out of a single ice patch in Norway in recent years because of climate change. Researchers from the Universities of Cambridge, Oslo and Bergen gathered up a total of 68 arrow shafts , some with arrow heads still attached or nearby, and many other artefacts. Almost all of the items were found on an area of mountainside no bigger than 18 hectares in Jotunheimen, a region of southern Norway. The oldest arrows date from around BC while the youngest are from roughly AD , based on radiocarbon analysis. Peaks and troughs in reindeer hunting activity could also have played a role.
Scientists use particle accelerator to date wine
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Matthes in The NASA Earth Observatory notes three particularly cold intervals: one beginning about , another about , and the last in , all separated by intervals of slight warming. At most, there was modest cooling of the Northern Hemisphere during the period. Several causes have been proposed: cyclical lows in solar radiation , heightened volcanic activity , changes in the ocean circulation , variations in Earth's orbit and axial tilt orbital forcing , inherent variability in global climate, and decreases in the human population for example from the Black Death and the epidemics emerging in the Americas upon European contact .
The 300-year History of Internet Dating
After the tragic deaths of the summer and another sad renaissance for the Black Lives Matter movement a lot of interracial couples found themselves talking about race for the first time. Early on in their relationship, Jamila gave her white husband Tommo a crash course in their racial differences: the expected ignorant comments from others, the inability to walk into a shop and find her cosmetic needs catered for, and the whitewashing of historical figures that were banished from the school curriculum. The divide between people being passively non-racist and actively anti-racist became a major talking point. Protests in the US and UK — including the toppling of the statue of slave trader Edward Colston — also opened up a conversation about what individuals consider an appropriate response to institutional racism.
Scientists say the secrets to success in online dating are to aim high, keep your message brief, and be patient. Playing "out of your league" or dating people considered more attractive than you, is a winning strategy, according to a new analysis of internet daters in the US. Men had greater success when they approached women they believed were more desirable than themselves. The new study has been published in the journal, Science Advances. Internet dating has become the dominant form for those seeking romance - it's the third most popular means of meeting a long term partner and around half of all year olds now use dating apps.