ISRO's Mangalyaan (2013) reached Mars orbit for just $74 million — cheaper than the Hollywood film "Gravity" ($100 million) and the cheapest Mars mission ever.
Archaeologists found 3,000-year-old honey in Egyptian tombs that was still edible. Honey's low moisture and acidic pH make it inhospitable to bacteria.
An octopus has three hearts: two pump blood to the gills, while the third pumps it to the body. When swimming, the body-heart stops — which is why octopuses prefer crawling.
Sign in to unlock unlimited facts, like, save, and submit your own.