Cassandra Peterson rose to fame for her horror hostess role of Elvira. Her real life was every bit as terrifying—and titillating—as the films she presented to audiences.

Drag icons Jinkx Monsoon, Trixie Mattel, and Cassandra Peterson (aka Elvira, Mistress of the Dark), also offer their perspectives.

Vera C. Rubin’s research into stars in galaxies led to the modern understanding of dark matter.

In it, the Elvira, Mistress of the Dark star looks much different with pin-straight hair parted down the middle and a serious look on her face.

The universe seems to be spinning, and that could explain what dark energy is and why it's weakening while revealing our place within the multiverse.

When Elvira first met Harley Quinn, the Mistress of the Dark was desperate for any plan that could help her save her beloved TV show after it was threatened with cancellation by heartless ...

Cassandra Peterson, who portrays Elvira, Mistress of the Dark, made a special announcement on June 19.

This year's San Diego Comic-Con exclusive Monster High Skullector's Doll is a glitzy, Vegas showgirl version of Elvira, Mistress of the Dark.