Earth Day is April 22. The 43-year-old tradition, started in the spring of 1970, signaled the rise of the modern environmental movement. Around 20 million people across the United States took to ...

Some places are off-limits for a reason. From cartel warzones to islands crawling with venomous killers, we’re exploring ...

Extinction is a natural part of life on Earth. But occasionally, extinction rates have surged far beyond usual levels, driving mass extinction events that have reshaped the trajectory of life. After a ...