Polling on the Clinton-Trump TV showdown – and why not all polls are equal
Are some US inner cities more dangerous than Afghanistan?
How much should spend when a couple get married?
How many people have died during President Duterte’s drug crackdown?
Do women’s periods start to synchronise if they spend time together?
The story behind the countries that have not executed anyone for 10 years
Has 2016 been a particularly bad year for terrorism in Europe?
Why are swimming world records frequently being broken?
What makes a country successful at winning gold, silver and bronze?
How can the techniques of computer science help us in everyday life?