Schools brief
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What is consciousness?
The hard problem
The final brief in our series looks at the most profound scientific mystery of all: the one that defines what it means to be human
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Why does time pass?
The moving finger writes
In our fifth brief on scientific mysteries we ask why travelling through time, unlike travelling through space, is irreversible
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What caused the Cambrian explosion?
The other Big Bang
In the fourth of our series of articles on scientific mysteries we ask why, a mere 542m years ago, animal life suddenly took off
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Of what is the universe really made?
To the dark side
In the third of our briefs on scientific mysteries we ask just what it is that makes up 95% of the cosmos
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Is the universe alone?
Multiversal truths
In our second brief on scientific mysteries, we ask whether the world might make more sense if other universes existed
![](https://www.economist.com/img/b/1424/801/90/sites/default/files/images/print-edition/20150808_SBD001.jpg)
How did biology begin?
Life story
In the first of a series of six briefs looking at unsolved scientific mysteries we ask how living things got going and whether they exist elsewhere than Earth
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Making banks safe
Calling to accounts
The final article in our series on the financial crisis examines the best way to make banks safer without killing lending
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Stimulus v austerity
Sovereign doubts
The fourth in our series of articles on the financial crisis looks at the surge in public debt it prompted, and the debate about how quickly governments should cut back
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Monetary policy after the crash
Controlling interest
The third of our series of articles on the financial crisis looks at the unconventional methods central bankers have adopted to stimulate growth in its wake
![](https://www.economist.com/img/b/1424/801/90/sites/default/files/20130914_SBC363_2.png)
The dangers of debt
Lending weight
The second in our series of articles on the financial crisis looks at the role debt and deleveraging have played in the turmoil
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The origins of the financial crisis
Crash course
The effects of the financial crisis are still being felt, five years on. This article, the first of a series of five on the lessons of the upheaval, looks at its causes