A fish allergy, as opposed to a shellfish allergy, is one in which your immune system reacts abnormally to a finned fish such as tuna, halibut, or salmon. It is a somewhat less common form of food ...

Add 21 more miles. There, 400 million years ago, watch your lobe-finned fish ancestors take awkward steps onto land, breathing Devonian air with primitive lungs. We’re still less than one-tenth of the ...