The 1:1 ratio results from the way the X and Y chromosomes are doled out in sperm and eggs. We know that boys and girls are produced in much the same frequency. But how – and why – is this 1:1 ...

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By these definitions, 1 large calorie equals 1,000 small calories, and 1 kg equals 1,000 g. Experts created the term kilocalorie to avoid confusion between large and small calories. The prefix ...

The late Russian opposition leader Alexei Navalny was taunted by prison guards who hid sweets in his pockets in a bid to ‘undermine’ his hunger strike, his prison diaries have revealed ...