The ancient Aztec civilization in current day Mexico used obsidian for making hunting tools and jewelry.

VOA: special.2009.09.16

But more than one hundred years passed before the current, widely used seat belt was developed.

VOA: special.2010.02.09

That study used computers and current ice-level information to predict future ice levels.

VOA: special.2009.05.05

The current system has been used since two thousand five.

VOA: special.2009.05.06

Economists point out that the current jobless rate is already higher than the hypothetical rate that was used to calculate the health of banks and other financial institutions in so-called "stress tests" earlier this year.

VOA: standard.2009.06.07