Researchers have found that giving your brain a little electrical zap while you sleep can lead to quicker learning and improved memory. Future You's episode 6 explores what this will mean in 2050. NPR hide caption

Pseudomonas aeruginosa bacteria — rod-shaped bacteria in this tinted, scanning electron microscope image — are found in soil, water and as normal flora in the human intestine. But they can cause serious wound, lung, skin and urinary tract infections, and many pseudomonas strains are drug-resistant. Science Photo Library/Science Source hide caption

The Supreme Court heard arguments Tuesday on the DACA program. Susan Walsh/AP hide caption