BRAIN TEASERS

enter your answer and press button OK

There is an ancient inventio...

There is an ancient invention still used in some parts of the world today that allows people to see through walls. What is it?

Correct answers: 49

The first user who solved this task is Djordje Timotijevic.

#brainteasers #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

What do you do when 50 zombies...

What do you do when 50 zombies surround your house?
- Hope it's Halloween.

Jokes of the day - Daily updated jokes. New jokes every day.

Follow Brain Teasers on social networks

Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

Wolfgang Ostwald

Died 22 Nov 1943 at age 60 (born 27 May 1883).German chemist who devoted his life as a teacher, researcher, editor and one of the founders of colloid chemistry. He defined colloids as disperse systems that are generally polyphasic and that possess particles 1-100 millimicrons in size. He discovered the rule of colour dispersion in the optics of colloidal systems, explained colloids' irregular flow behaviour, textural viscosity, and textural turbulence, and developed a method of foam analysis. He edited (from 1909) Kolloidchemische Beihefte and other journals and as the founder (1922) and president of the Kolloid Gesellschaft, Ostwald advanced research in colloids. He was the second child of 1909 Nobel Laureate Friedrich Wilhelm Ostwald.

This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.