Can you guess the limerick? If not scroll down...
A dozen, a gross, and a score
Plus three times the square root of four
Divided by seven
Plus five times eleven
Is nine squared and not a bit more
Meet these 10 amazing women who changed our understanding of the cosmos
The mysterious world of quantum mechanics has mystified scientists for decades
Peter Russell in conversation with the audience at SAND18 US.
Historian Yuval Noah Harari has taken the world on a tour through the span of humanity
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