The QI Elves @qikipedia@tooot.im

The tarsier is the only known primate to communicate exclusively in ultrasound. (Image: mtoz) https://t.co/2UhPL2xTKD

For more QI facts follow us on Instagram at http://instagram.com/theqielves https://t.co/328WKNFJvS

Kate Winslet keeps her Oscar in the bathroom so that guests can practice their acceptance speeches in front of the mirror.

The European Tree of the Year 2019 was won by Hungary's "The Almond Tree of the Snowy Hill in Pecs" (pictured). The UK has never won the title, but they did come second in 2017 with the Brimmon Oak in Newtown, Wales. https://t.co/9FcnYQmywv

CHEROPHOBIA is the belief that when you are happy, something bad will happen soon.

When Harold Wilson was hit in the face with a raw egg in 1970, his only response was "if the Tories get in, in five years no-one will be able to afford to buy an egg."

"Millions long for immortality who don't know what to do with themselves on a rainy Sunday afternoon.” SUSAN ERTZ

Alarm clocks were one of the only civilian items still allowed to be manufactured in the United States during WWII. This was because workers who had old, broken alarm clocks were more likely to miss work.

Until 1983, the state slogan of Maryland was "oooh, the state I’m in". (h/t @RectorSun)

You might not be able to go to Mars (yet), but your name can. NASA is accepting submissions of names to fly aboard the next Mars rover: https://www.jpl.nasa.gov/news/news.php?feature=7407

Blessed is the man who, having nothing to say, abstains from giving us wordy evidence of the fact. GEORGE ELIOT

In the last 18 months Facebook has deleted over 6.2 billion fake accounts.

In 2005, when noted neuroscientist James Fallon was mapping patterns in the brain scans of psychopaths, he made a rather startling discovery: his own brain matched the profile. https://www.smithsonianmag.com/science-nature/the-neuroscientist-who-discovered-he-was-a-psychopath-180947814/

QI minus 15 minutes!
Tonight at 9pm on @BBCTwo, Sandi and Alan are joined by @BillBailey, @ClaudiaWinkle and @jupitusphillip to discuss Ologies! #QI https://t.co/6MZNvxZKDA

In Sweden, most school buses and government vehicles include a built-in Breathalyzer, which prevents the vehicle from starting if its driver is not sober.

The world’s first trees didn’t have rings; they had spots instead.

Tonight at 9pm on @BBCTwo we'll be discussing OLOGIES with Sandi, Alan, @BillBailey, @ClaudiaWinkle and @jupitusphillip #QI https://t.co/7PRHIDR9Yg

When electricity was first introduced into houses, the most common way of plugging in an appliance was to screw it directly into a lightbulb socket.

Henrik Ibsen, the Norwegian playwright, had a small mirror glued to his hat which allowed him to check his appearance - he considered himself to be small and unattractive, and strove to constantly hide his face behind a large beard. https://t.co/uKPhfDLiKb

The average US household has 50 appliances plugged in at any one time, all of which draw small amounts of power even when switched off. This makes up 25% of of all residential energy consumption, and costs more than $19 billion in electricity bills every year.