An curved arrow pointing right. Foie gras is a pricey delicacy, costing $40 to $80 a pound. It's also controversial, with bans in several countries and cities like New York planning bans of their own.

Image X-ray scattering revealed red fats and black liver protein matrix of lab samples, with regular foie gras pâté in the top right. Mixed liver and untreated fat in the top left yielded a poor ...

The French delicacy foie gras could be made more ethically thanks to a technique that replicates the way fats are metabolised in force-fed birds, although the process still depends on farmed animals.