China claims it successfully cloned 3 'super cows' that make vastly more milk than normal cows do

• China claims it's cloned three cows that make up to 18 metric tons of milk per year.
• "Super cows" are hard to breed since they're identified at the end of their lives, per state-affiliated media.
• The scientists say they plan to build a herd of 1,000 super cows in the next two to three years.

Scientists in China have cloned three cows that produce abnormally high amounts of milk, state-affiliated media claimed on Tuesday.