1 Steaming lakes and thundersnow: 4 questions answered about weird winter weather 2 Atmospheric rivers are hitting the Arctic more often, and increasingly melting its sea ice 3 How can I get ice off my car? An engineer who studies airborne particles shares some quick and easy techniques 4 Catching lightning in a fossil and calculating how much energy a strike contains 5 The Trinity Site featured in ‘Oppenheimer’ is a sobering reminder of the horror of nuclear weapons 6 A mild-mannered biker triggered a huge debate over humans’ role in climate change 7 Why carbon dioxide has such outsized influence on Earth’s climate 8 What would it feel like to touch a cloud 9 Heating and cooling space habitats isn’t easy one engineering team is developing a lighter, more efficient solution 10 Can next-generation bomb ‘sniffing’ technology outdo dogs on explosives detection