BARABOO â No Wisconsin state park is more popular.
With its towering bluffs, miles of hiking trails, hundreds of campsites and a clear, cold lake that attracts anglers, swimmers, paddlers and scuba divers, Devilâs Lake State Park is an amphitheater of outdoor recreation.
Add in the fact that itâs just a 45-minute drive up Highway 12 from Madison and less than three hours from Chicagoâs western suburbs and itâs no surprise that the parkâs 1,300 day-use parking spots and 1,300 picnic tables are often all claimed by early afternoon between Memorial Day and Labor Day.
Miles of trails traverse the West and East bluffs of Devil s Lake State Park, opening to breathtaking views such as this one of the Devil s Doorway rock formation at the southeast corner of the lake.Â
Do terrestrial geomagnetic field reversals have an effect on Earth s climate? Cooper et al.created a precisely dated radiocarbon record around the time of the Laschamps geomagnetic reversal about 41,000 years ago from the rings of New Zealand swamp kauri trees. This record reveals a substantial increase in the carbon-14 content of the atmosphere culminating during the period of weakening magnetic field strength preceding the polarity switch. The authors modeled the consequences of this event and concluded that the geomagnetic field minimum caused substantial changes in atmospheric ozone concentration that drove synchronous global climate and environmental shifts.
Geological archives record multiple reversals of Earth’s magnetic poles, but the global impacts of these events, if any, remain unclear. Uncertain radiocarbon calibration has limited investigation of the potential effects of the last major magnetic inversion, known as the Laschamps Excursion
The first Americans: How and when were the Americas populated?
by Mary Caperton Morton Thursday, December 15, 2016
Archaeologists used to have a tidy story to explain the earliest peopling of the Americas: During the last ice age, when sea levels were much lower, a band of intrepid travelers walked from East Asia, over the Bering land bridge, and into Alaska. From there, they followed an ice-free corridor east of the Canadian Rockies south onto the megafauna-rich plains, eventually spreading throughout North and South America by 11,000 years ago and leaving a trail of finely shaped “Clovis” spear points in their wake.
But the story is not so simple. The once-dominant “Clovis First” Hypothesis has been overturned in recent years by discoveries of an array of pre-Clovis tools and campsites throughout North and South America that date to as early as 16,000 years ago. But how is it that people colonized the Americas so much earlier than once thought? From where did t
Earth s Magnetic Field Broke Down 42,000 Years Ago And Caused Massive Sudden Climate Change econintersect.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from econintersect.com Daily Mail and Mail on Sunday newspapers.