The group caught no live animals but acquired two frozen specimens from sources that scientists declined to identify.

The blood center now has 8,686 frozen specimens of cord blood in its bank, Dr. Rubinstein said.

Deeply frozen specimens were quickly weighed, boiled in water, homogenised and centrifuged as previously described.

We found enough preserved genetic material in the frozen specimens to recreate the species.

Few frozen specimens have preserved genitals, so the gender is usually determined through examination of the skeleton.

Since mammoth carcasses were more likely to be preserved during autumn, it is possible that only the winter coat has been preserved in frozen specimens.

Several frozen specimens have also been found in Siberia, the latest in 2007.

"We have studied these shrimp only in the form of frozen specimens with damaged light receptors," she said.

(Don't even think about substituting frozen specimens; they simply don't make the grade.)

One night a few weeks later he was found trying to get at the frozen specimens themselves and Edwards fired him outright.