Almost the last word.

The article discusses how ancient Britons may have measured the length of days to accurately place the Heel Stone at Stonehenge to mark the solstices. It is suggested that they observed where the furthest north or south sunrise occurred on the solstices. They may have tracked and measured the minimum length of the sun's shadow and observed the sun and moon's different positions each day. The article also explores the possibility of using machine learning to communicate with whales and dolphins, highlighting the challenges and ethical considerations involved. [Extracted from the article]

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