Most volcanic activity happens beneath the ocean - but we often don't know about it. This article looks at how underwater volcanoes form and what happens when they erupt.

Models of how the Earth could look in 250m years, with huge land masses and longer days, can help exoplanet hunters

Global migration flows show a profound diversification of migrants' groups in recent years. Their patterns of nationality, ethnicity, language, age, gender and legal status are growing ever more complex and migrants with 'new diversity' traits live in cities alongside people from previous immigration waves. Prof. Steven Vertovec's comparative study helps understand how old and new waves of migrants meet, mix, interact and get integrated into a given society.

As coronavirus wreaks havoc on existing structures, we take a look at some visions for cities of the future - and how they hold up

Apple Maps now shows Crimea - annexed from Ukraine in 2014 - as part of Russia, when viewed there.