Tip of the Day

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English

• Chemical elements
  Periodic table of elements.
  
• World countries
  Capitals, currencies, flags and more.
  
• Logical fallacies
  Learn to identify flaws in reasoning.
  
• XKCD comics
  A webcomic of romance, sarcasm, math, and language.
  
• Hacker laws
  Laws, Theories, Principles and Patterns for developers.
  
• Untools
  Thinking tools to help you solve problems, make decisions and understand systems.
  
• Sustainable Development Goals
  The UN global goals for sustainable development.
  
• Web Content Accessibility Guidelines 2.1
  Success criteria to fulfill WCAG.
  

Deutsch

• Pflanzen
  Häufige Pflanzenarten in Europa.