Editor's note

One of the most asked questions when it comes to the coronavirus pandemic is which country has the best strategy for curbing the spread of COVID-19. Many of us are anxiously following the daily updates of ever rising death rates across the world, hoping to learn the answer.

But different countries have radically different approaches to testing, sampling and reporting. This leads to significant biases in the data, which can make country comparisons useless. If a country has a low death or infection rate compared to others, it is not necessarily because it is managing the virus any better or that the virus has infected fewer people. Luckily, there are ways to improve the modelling, something which should ideally be done in parallel with random testing.

Also check out our long read about a strange paradox: the better we manage to contain the coronavirus pandemic, the less we will learn from it. That said, we may be able to change how we travel in the future.

The pandemic has allowed many of us some much needed time to reflect on the human condition. Peter from Darlington wrote to us to ask whether racism and bigotry is in our DNA and, if so, why only some people battle with their instincts. You can read an insightful response by Tom Oliver as part of our Life’s Big Question series, which is co-published by BBC Future.

Perhaps the biggest existential question of our time is how to save the planet. New research shows that the Arctic is likely to be a major methane source in the coming decades – and it’s all down to recent carbon emissions.

Miriam Frankel

Science Editor

Top stories

New cases daily for COVID-19 in world and top countries. Chris55 /wikipedia

Coronavirus: country comparisons are pointless unless we account for these biases in testing

Norman Fenton, Queen Mary University of London; Magda Osman, Queen Mary University of London; Martin Neil, Queen Mary University of London; Scott McLachlan, Queen Mary University of London

We need to update models on death rates or introduce truly random testing to understand the true impact of the coronavirus.

Friedmann Vogel/EPA

A strange paradox: the better we manage to contain the coronavirus pandemic, the less we will learn from it

Maarten Boudry, Ghent University

The pitfalls of self-defeating prophecies.

BLACKDAY/Shutterstock

Is racism and bigotry in our DNA?

Tom Oliver, University of Reading

If we are not careful, the coronavirus pandemic could lead to a rise in xenophobic attitudes.

Joshua Dean

Arctic climate change – it’s recent carbon emissions we should fear, not ancient methane ‘time bombs’

Joshua Dean, University of Liverpool

The wet and low-lying East Siberian Arctic is likely to be a major methane source in the coming decades.

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