13 Unsolved scientific puzzles

[Geriatrix]

http://entertainment.timesonline.co...article5797028.ece?token=null&offset=0&page=1

Some highlights.

We can only account for 4 per cent of the cosmos

Two spacecraft are flouting the laws of physics

A decade ago, we discovered that the fundamental constants of physics might not be so constant after all

NASA scientists found evidence for life on Mars. Then they changed their minds

Mimivirus doesn’t fit with the established story of how life on Earth got going.