The human body is fascinating. You might think you know it all, but these weird facts about everything from your brain to your toes are sure to surprise you.

  1. Most often found in ovaries and testicles, teratomas are a type of tumor ​that are made up of different types of tissue — from hair and skin to muscle and bone — and can range in size from 1 centimeter to 17 inches.
  2. Your brain is made up of 100 billion neurons, which are capable of generating enough electricity to turn on a 15- to ​a 20-watt bulb.
  3. Hairy tongue is a completely harmless and surprisingly common condition. The tiny bumps on your tongue (aka papillae) are made out of keratin — the same protein that makes up your hair — so when papillae don't shed like they're supposed to, they grow longer and longer until the ​tongue looks, well, hairy.
  4. An empty stomach contains acid with a pH of between 1 (battery acid) and 3 (vinegar), meaning it could potentially dissolve metal. ​
  5. You're always looking at your nose —​ your brain just ignores it. This is called "unconscious selective attention" and helps us stay focused on more​ important things.
  6. If you laid out your blood vessels end to end in a straight line, it would be almost 100,000 miles long. That's about four times the circumference of the Earth.
  7. The average human produces as much as 1.5 liters of saliva every day.
  8. Scientists used to think we could only distinguish ​10,000 scents, but new research proved our noses are a lot more powerful than we thought.
  9. Your heart is actually located smack-dab in the middle of your chest.
  10. Your pinky finger might look tiny, but it’s mighty. In fact, you'd have to say goodbye to a whopping 50 percent of your hand strength if you didn't have one.
  11. ​The brain lends your eyes a helping hand when you experience a blind spot by actually filling in the missing information.
  12. Lighter features — including pale skin, blonde hair, and blue eyes — only began to develop in Europeans about 8,000 years ago.
  13. Babies get their very own set of unique fingerprints before they're even born. The "friction ridges" begin to develop around 13 weeks, when the entire ​fetus is only about 3.75 inches long.
  14. Your mouth is home to hundreds of bacteria — 700 different species, to be exact.
  15. Just like a lizard can grow back its tail, your liver can completely repair itself in only 30 days.
  16. Blessed with a naturally rosy pout? You can thank the oxygen-rich blood flowing through capillaries underneath the thin skin of your lips for that. ​This also is why your lips change to a bluish hue when you're low on oxygen.
  17. ​The wrinkly skin helps your body grab things better in wet conditions. Thanks to the wrinkles, water is channelled out of the way and we can hold onto slippery surfaces more effectively.
  18. Tastebuds aren't only on your tongue; they're also on your lips, cheeks, roof of your mouth, and lining of your throat.
  19. Your belly button is a scar; your first scar, to be exact. The funny-looking body part is essentially scar tissue left behind from the umbilical cord that connected you to your mother.
  20. Humans shed about 600,000 particles of skin every hour.

Sep 21: Delhi’s Race Course Road, Indian Prime Minister’s official residence, was renamed as Lok Kalyan Marg, ending a row between the BJP and the AAP.

World’s most peaceful countries

The Institute of Economics released its list of world’s most peaceful countries by calculating the Global Peace Index (GPI). The GPI considers parameters of crime, terrorism, political security and safety to generate a peace index.
Rank Country Score
1 Iceland 1.192
2 Denmark 1.246
3 Austria 1.278
4 New Zealand 1.287
5 Portugal 1.356
6 Czech Republic 1.360
7 Switzerland 1.370
8 Canada 1.388
9 Japan 1.395
10 Slovenia 1.408
Countries at the Bottom
Rank Country Score
153 Pakistan 3.145
154 Libya 3.200
155 Sudan 3.269
156 Ukraine 3.287
157 Central African Republic 3.354
158 Yemen 3.399
159 Somalia 3.414
160 Afghanistan 3.538
161 Iraq 3.570
162 South Sudan 3.593
163 Syria 3.806