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Sciences

• Physics (41)
  • The needle and the magnetic poles
  • Sound
  • Dew
  • Shadows
  • Noise
  • Entropy
  • Movement
  • Inertia
  • Rotation by inertia
  • Weightlessness
  • Pendulum
  • Infrasound
  • Synchronous and asynchronous electric motors
  • Kinetic energy and how to accumulate it?
  • Ultrasound
  • Fraction
  • Cartwheels
  • "The wheel of laughter"
  • Crystals
  • A long jump
• Chemistry (41)
  • The wolfram
  • Iron bacteria
  • Н2SO4
  • Zinc
  • Iodine
  • Plutonium
  • Benzoic acid
  • Slaking of lime
  • How can I freeze water?
  • How does carbon dioxide tread on the steps?
  • Red solution
  • Fountain on the table
  • Homemade indicators
  • How to get sugar from sawdust?
  • AgNO3
  • Nitric acid
  • White powder of copper sulfate
  • "Volcano"
  • The liquid boils... from sulfuric acid
  • Properties of metals
• Biology (44)
  • Talegal
  • Cacti
  • Cedar
  • Ravenala
  • Fish in a fur coat
  • Scorpionfish
  • Anabas
  • Poisoning moray eels and "sea wasp"
  • Fish-ball
  • Fugu
  • Roses
  • Ferns grow
  • Fish-sensations
  • Light-emitting animals
  • Eucalyptus trees
  • The mushroom exploded!..
  • Calebas
  • Whales
  • Sausage tree
  • Coffee
• Mathematics (42)
  • Ancient unit of measurement
  • The magic square
  • Pythagorean triangles
  • Perfect numbers
  • Fermat's numbers
  • Destiny number
  • Chances
  • Proportion
  • Natural numbers
  • Negative numbers
  • Prime numbers
  • Rational numbers
  • What is triangulation?
  • How easy it is to take steps
  • Infinity
  • Median
  • Sinus
  • Fibonacci numbers
  • Cartesian coordinates
  • Number 5
• Computer science (41)
  • Database
  • Modem
  • Monitor
  • Multimedia
  • Operating systems
  • CDs
  • Network cards
  • Plotters
  • Compression of information
  • Printers
  • BIOS
  • Joystick
  • Development models and software design methods
  • Keyboard
  • Coding
  • The principle of the stored program
  • Processes
  • Threads
  • Masks method
  • Internet protocols
• Astronomy (41)
  • About the Universe
  • On Venus
  • The Earth
  • The Mercury
  • The Saturn
  • The Jupiter
  • The mysteries of the Moon
  • Polar lights
  • Rhythms of the Sun
  • Astronomers
  • Artificial satellites
  • How to find the North Star
  • If there was no moon?
  • The space of Einstein
  • Giant stars
  • Flicker of stars
  • Saturn's rings
  • Solar storm
  • K.E. Tsiolkovsky
  • The stars in the afternoon
• Geography (40)
  • Gulliver's names and lilliput names
  • Atlantis
  • Greenland
  • Issyk-Kul
  • Curacao
  • Titicaca
  • Yangantau
  • Guardafay
  • Cameroon
  • Labrador
  • Nakhodka
  • Bindibu
  • Pamir
  • Christopher Columbus
  • Taymyr
  • Honduras
  • Unusual well
  • Lake of fountains
  • The island of the "lost pot"
  • Underground ocean
• Geology (40)
  • Growth of crystals
  • Amazonite
  • Gagat
  • Malachite
  • The pyrope
  • Charoite
  • Amber
  • Amorphous gems
  • Caves
  • Double refraction
  • Electrical properties of minerals
  • Minerals
  • About mineralogy
  • How to grow a ruby?
  • Magma
  • Apatite
  • Pyrite
  • Minerals properties
  • Hardness of minerals
  • Amethyst
• Archeology (41)
  • Country Margush
  • Arnhemeland
  • Qumran scrolls
  • Lagash
  • Tell Khalaf
  • Urartu
  • Chatal-Hyuk
  • Zinjanthropus
  • "Man skilled"
  • Nineveh
  • Ashur
  • Mari
  • Ebla
  • Etruscans
  • Abu Simbel
  • The city of Petra
  • Mycenae
  • Richard Wies and the pyramids
  • Unknown history of mankind
  • Coliseum
• Miscellaneous (26)
  • Chemists joke
  • Geologists are joking
  • Mathematicians are joking
  • Biologists joke
  • Physicists are joking
  • Seven wonders of the world
  • Rules of life
  • Time - seconds, minutes, hours, years...
  • Colors
  • Mnemonic techniques
  • The first patent
  • Journal of scientists
  • The smallest scooter
  • Clock with a lemon
  • Dictionary of false truths
  • Artificial islands