The science of eggs
And why you’ve been buying the wrong ones
The science of supermarket eggs – and why you’ve been buying the wrong ones all along
Sainsbury’s says white ones are better for the planet, but that’s not all. For half a century, British shoppers have been paying extra for brown shells and orange yolks – but from the number stamped on the shell to the colour and age of a hen, this is what really matters, writes Hannah Twiggs
