The number of mutations over time helped the team estimate when the duplications in soybeans took place.

VOA: special.2010.02.02

This was an estimate of the number of words a six-year-old should be able to read.

VOA: special.2010.05.02

The researchers asked parents to estimate the number of cigarettes smoked near each child.

VOA: special.2009.01.13

Observers estimate the true number of eligible voters at not much more than 700,000.

VOA: standard.2009.08.30

"They are so complicated that if you tried to estimate how many ways you can make a snowflake, you get a huge number not just billions or trillions, but bigger than the number of atoms in the universe.

VOA: standard.2009.12.19