Can we rely on our cosmological picture of the universe, or might we have got it all wrong? Although complicated math seems to support theories like dark matter and dark energy, we should be ready to interrogate the reasoning behind them, writes Bjørn Ekeberg. 

"It is not anti-scientific to question established beliefs, but central to science itself. At the creative heart of science is a spirit of open-minded inquiry," writes Rupert Sheldrake in The Science Delusion.

It's hard to imagine a scientific subject matter that would call for more open-mindedness than the ambitious project of understanding the entire cosmos from our own extremely limited standpoint within it.