"Chemical evidence from ancient crystals suggests that Earth's tectonic plates had already started moving 3.3 billion years ago, relatively early in our planet's history. By analysing zircon crystals recovered from Western Australia - the oldest-known fragments of Earth rocks - researchers also found that the ancient Earth could have contained more oxygen, and possibly more water, than suspected."
"Around 1590, Galileo Galilei filled the margins of a copy of Ptolemy's The Almagest with his musings - and they have just been rediscovered. Historian Ivan Malara recognized the storied astronomer's handwriting in the book, which was held in a library in Florence. The contents, including a transcribed psalm, could shed light on the intellectual origins of Galileo's groundbreaking view of the Solar System."
"A study of more than 600 people over 40 in Finland reveals that nearly everyone had had frayed, torn or otherwise degenerated rotator cuffs - even people whose shoulders felt fine. Damage to this group of muscles and tendons is a common cause of shoulder pain, especially in older people."
Chemical analysis of ancient zircon crystals from Western Australia reveals that Earth's tectonic plates began moving approximately 3.3 billion years ago, earlier than previously established. These findings suggest the early Earth contained more oxygen and water than expected, creating conditions potentially more favorable for life. Historians identified Galileo Galilei's handwritten annotations in a 1590 copy of Ptolemy's The Almagest held in a Florence library, including transcribed psalms that may illuminate the intellectual foundations of his revolutionary Solar System model. A Finnish study of over 600 people aged 40 and older found nearly universal rotator cuff degeneration, including in asymptomatic individuals, indicating this condition is widespread in aging populations.
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