World’s oldest asteroid strike in western Australia might have triggered a global thaw
Models show that if the Yarrabubba asteroid hit an ice sheet 5 km thick, more than 200 billion tonne water vapour would be ejected
Global warming is universal, speedy and worldwide: Study
In contrast, other well-known cold and warm snaps of the past were more regional
Volcanoes play their own role in warming Earth: Study
It also found that all volcanoes on the planet are emitting carbon dioxide