Swelling and pain: While these are not specific, swelling and pain of the thigh or of the calf can be signs and symptoms of deep vein clots of the thighs. Blood clots of the arteries in the thighs would cause a cold, painful, and numb foot and calf.
1 One billion is a 1 with nine zeros after it, denoted by 1,000,000,000. 2  One billion seconds is about 31 and a half years. 3  One billion pennies stacked on top of each other would make a tower almost 870 miles high.4  If you earn $45,000 a year, it would take 22,000 years to amass a fortune of one billion dollars.illions. Next up is one billion: 1  One billion is a thousand millions. 2  One billion is a 1 with nine zeros after it, denoted by 1,000,000,000. 3  One billion seconds is about 31 and a half years.
How many is a billion? The answer may seem obvious, but the use of this word can lead to confusion. In the UK and Ireland the word traditionally meant the number 1,000,000,000,000 (a million millions), which is called a trillion in the United States.