The Underground Railroad was neither underground nor a railroad — but it did fight the system of slavery by secretly shepherding slaves to freedom in the North.

How many people did Ted Bundy kill? We may never know the full extent of Bundy's heinous crimes, but we can share the tales of the women who we know crossed his path.

The night after murdering Sharon Tate and her friends, the Manson Family stabbed Leno and Rosemary LaBianca to death.

Weighing in at 2,000 pounds and sporting arm-sized fangs, the entelodont earned its status as the "hell pig" of prehistoric North America.

Susan Atkins fell in love with Charles Manson the minute she met him in San Francisco. She loved him so much, in fact, she obeyed his orders to kill.

Patricia Krenwinkel once thought she'd become a nun. Instead, she became a part of Charles Manson's "family" and killed in his name.

Was Sirhan Sirhan really the man who killed Robert Kennedy? Or was there a larger conspiracy at play?

Craigslist Killer Philip Markoff used the classifieds website to solicit his victims. From there he targeted women who he robbed, abused, and ultimately, killed one.

The life of Calamity Jane may be more fiction than fact, but it's enthralling either way.

Mary Todd Lincoln led a tragic life. She suffered the deaths of her mother, three of her children, and her husband. Today, she also suffers from history's cold gaze.

Discover why the wider Abraham Lincoln assassination plot was far larger than the death of one man and how this three-pronged attack sent out violent aftershocks for decades to come.