Monday links

On February 29, 1504, Columbus tricked Jamaicans using knowledge of an upcoming lunar eclipse.

Leap Day: The Story Behind This Quirky Calendar Event, Five Weird Facts About Leap Years and the messy math of Leap Years.

Bullet-proof chairs and sofas are coming.

Gallery of sexist vintage ads.

A 5,000-year-old Egyptian dress is the oldest woven garment on record.

15 of History's Greatest Mad Scientists.

ICYMI, Friday's links are here, and include fashion advice from a 1980s Stasi (East German secret police) disguise seminar, the accidental invention of the microwave, the next generation of Boston Dynamics’ Atlas robot, and a super slow motion video on the chemistry of matches.

Sexist vintage ads

These vintage ads are mostly selling products to/for women who are emitting foul odors from various body parts, but there are some for women who aren't up to snuff in the kitchen, and a few more generally sexist ads thrown in:

Lots more here, here, here, here and here.