Unusual mammatus clouds were spotted on Wednesday morning in parts of the United Kingdom. The name mammatus comes from the Latin mamma which means 'udder' or 'breast'. The bulging cloud was made to ...

Formed by cold air sinking down, mammatus clouds are usually seen when there is turbulence in a cumulonimbus cloud. Two astronauts are returning home after nine months in space. Nick Beake of the ...

Unusual mammatus clouds were spotted on Wednesday morning in parts of the United Kingdom. The name mammatus comes from the Latin mamma which means 'udder' or 'breast'. The bulging cloud was made ...