Caught in the Act: Key Moments in Cell Death Captured

Using a new imaging technique, researchers for the first time captured the process in which developing killer T-cells are tested by dendritic cells, and others, to see if they react to normal proteins from the body, called self-antigens

Spring is in the air! It’s time to mow the lawn and breathe in the smell of freshly cut grass. But this pleasant springtime scent may actually be a chemical cry for help. In the latest Reactions episode, we explain how plants communicate, their chemical response to being damaged, and how bugs play a part.

Science really is everywhere! From the Big Bang to quantum mechanics to free will to ice skating, we explore it all featuring Neil deGrasse Tyson, Chuck Nice, theoretical physicist Brian Greene, neuroscientist Heather Berlin, rapper Baba Brinkman, and Olympic silver medalist figure skater Sasha Cohen.