A baker's dozen of unanswered questions

This blog is about asking questions. ... We don't even know all the correct questions to ask, much less the answers.

New Scientist has put together an intriguing list of 13 things that do not make sense that bring home this point:

• The placebo effect
• The horizon problem
• Ultra-energetic cosmic rays
• Belfast homeopathy results
• Dark matter
• Viking's methane
• Tetraneutrons
• The Pioneer anomaly
• Dark energy
• The Kuiper cliff
• The Wow signal
• Not-so-constant constants
• Cold fusion

I'm confident that when (or if) we ever find the answers to these questions, there will be another 13 questions to take their place! Life's interesting, isn't it.