Science

Scientists have 'hacked photosynthesis' in search of more productive crops
Scientists have re-engineered photosynthesis, the foundation of life on Earth, creating genetically modified plants that grow faster and bigger. They hope it leads to bigger harvests of food.
Nine countries now have nuclear weapons, even as the U.S. threatens to pull out of international non-proliferation treaties. That seems ominous. But is it? Do nuclear weapons even matter? Kerri Miller talks to three guests with three different views.
According to psychology professor Bridget Robinson-Riegler, smells have a strong connection to the memory parts of the brain. MPR News host Angela Davis talked to Professor Robinson-Riegler about smells and memories.