They will eat almost anything. Nuts, plants, insects and of course leftovers. Now we know why.
This has been learned from the unravelling of the pig's genome, a big project partly co-led by Animal Breeding professor Martien Groenen (out today in Nature and PNAS). Another revelation was that 10,000 years of domestication have lengthened the pig. Three genes give the farm pig two to four more vertebrae than the wild boar.