A natural weather event known as El Niño has begun in the Pacific Ocean ... For scientists in the US, their definition requires the ocean to be 0.5C hotter than normal for a month, the atmosphere ...

Climate troublemakers El Niño and La Niña have been around for a long time. A really, really long time. A new study says the dance between El Niño and its counterpart, La Niña, was present on ...