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A new way of measuring structures deep inside Earth has highlighted numerous previously unknown blobs within our planet’s mantle. These anomalies are surprisingly similar to sunken chunks of Earth’s crust but appear in seemingly impossible places.

For more than 5,000 years, humans have adorned themselves with tattoos.

In a new study, researchers used lasers to uncover highly intricate designs of ancient on mummies from Peru.

The preserved skin of the mummies and the black tattoo ink used show a stark contrast—revealing fine details in tattoos dating to around 1,250 A.D. that aren’t visible to the naked eye, said study co-author Michael Pittman, an archaeologist at the Chinese University of Hong Kong.

In 1956, a small group of scientists gathered for the Dartmouth Summer Research Project on Artificial Intelligence, which was the birth of this field of research.

To celebrate the anniversary, more than 100 researchers and scholars again met at Dartmouth for AI@50, a conference that not only honored the past and assessed present accomplishments, but also helped seed ideas for future artificial intelligence research.

The initial meeting was organized by John McCarthy, then a mathematics professor at the College. In his proposal, he stated that the conference was “to proceed on the basis of the conjecture that every aspect of learning or any other feature of intelligence can in principle be so precisely described that a machine can be made to simulate it.”