Instead, flashing yellow lights have multiple meanings; when you see them, you should proceed with caution. Police often do things we don't understand, like touching a car's tail lights during ...

in A Bright Yellow Light. On the plane Nadim injected Natasha with adrenalin thinking the reaction would quickly subside, but to no effect. After they landed, paramedics began frantically doing ...

Conversely, bright white or yellow light was better for staying awake ... including humans, meaning the findings should apply to people. They recommend more research to confirm it.