Tag: research finding
The Earth’s magnetic field, which shields the atmosphere from harmful radiation, is at least four billion years old, according to scientists.
Since 2010, the best estimate of the age of Earth’s magnetic field has been 3.45 billion years. But now a researcher responsible for that finding has new data showing the magnetic field is far older. John Tarduno, a Rochester geophysicist and leading expert on Earth’s magnetic field, and his team of researchers say they believe the Earth’s magnetic field is at least four billion years old.
Combined with the current weakening of Earth’s magnetic field, the data suggest that the region of Earth’s core beneath southern Africa may play a special role in reversals of the planet’s magnetic poles.
Patches of ground where huts were burned down in southern Africa contain a key mineral that recorded the magnetic field at the time of each ritual burning.
The best guide to the boundary between our everyday world and the “spooky” features of the quantum world has been a theorem called Bell’s Inequality, but now a new paper shows that we understand the frontiers of that quantum world less well than scientists have thought.
Using lenses and meta-materials, science is finding new ways to bend or reroute light. Like Harry Potter’s cloak or H.G. Wells’ chemical concoction, it could make an object impossible to see.
In addition to its memory and problem-solving functions, sleep may help our brains stay sharp, young, and healthy. Two years ago, the University of Rochester neuroscientist Maiken Nedergaard published the results of many years of research into the function of sleep.