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 ...
Train operator Chiltern Railways has revealed the first of its refurbished Class 168 trains. The operator is spending £12million on refurbishing its fleet of Class 168 trains, explaining that this is ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback