Hal Harris

The Dewar flasks that we use for storage of cryogenic fluids such as liquid nitrogen, oxygen, and helium, and which known outside the laboratory as "thermos bottles" were invented by James Dewar, who was the first person to liquefy hydrogen, and was nearly first in the nineteenth century races to liquefy all of the other gases.

Well, the final version of the National Science Education Standards has finally arrived.

In the novel "The Children of Men" by P. D. James, set in the year 2021, mankind is faced with extinction due to the worldwide sterility of human males. Is there a basis for fear that this is actually happening? Or is the reported decline in sperm counts, over the past half-century, even a fact?

After nearly a century of "modern" archaeology in Egypt's Valley of the Kings, it is surprising that any substantial finds remain to be uncovered, but archaeologist Kent R. Weeks discovered last year what appears to be a huge complex of tombs.

The forensic sciences have received a great deal of attention lately, partly as a result of the OJ trial, but in this lengthy piece, the fine writer, John McPhee, writes about the far less-familiar field of forensic geology.