Uncategorized
- Paleontology
Twice upon a Time
New fossil finds suggest that the complex features of mammals originated earlier than previously thought and might even have evolved independently in different mammalian lineages.
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19931
This article shows the formula for sodium hydrosulfide as NaH2S. Would it not be more accurate to present it as NaHS? G. David GrubbsCorinth, Texas The reader is correct.
- Health & Medicine
Rotten Remedy
The gas well-known for its smell of rotten eggs is, recent studies show, a ubiquitous concoction in the body. New studies suggest that the hydrogen sulfide occurring naturally inside us can be both friend and enemy to our health.
