A handful of companies own the patents on virtually every seed planted in the US. Now, a new crop of unowned seeds is bringing biodiversity back to farming.

Just like software development has been co-opted by a few global companies like Microsoft and Apple, the international seed development and trade, too, is controlled by a few big giants like Bayer (Monsanto), Corteva (DuPont) and ChemChina (Syngenta). A 2012 Oxfam study found that four companies dominate more than 60 percent of the global trade with grains.