The "Thucydides trap" refers to the theory that when a rising power threatens a ruling power, the result is often war. Are the US and China headed there?

The cat-attracting ability of perfume has been known since at least the 18th century. Will it help authorities catch a killer tiger?

Sister cities may seem like mere symbolic pairings, but many actually share meaningful ties that are deliberately instituted and sustained.

Insulin coma and deep sleep therapies were used for years on patients with mental illness, even though there was never any evidence they worked.

Gaining enough weight to survive a winter of hibernation is actually very hard work.

And other wonders of spontaneous generation.

From WWI to the 1950s, the "American Plan" rounded up sexually-active women and quarantined them, supposedly to protect soldiers from venereal disease.

The cultural meaning of Guy Fawkes’ conspiracy to blow up the House of Lords has shifted, from countercultural symbol to HBO drama.

In late nineteenth-century forensics, optography was all the rage. This pseudoscience held that what someone saw just before death would be imprinted on their eye.

For a younger generation trying to understand Marxism, the best way in may be: vampirism.