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Full-Text Articles in Life Sciences
The History Of Life In Nebraska: A Time-Travel Adventure, Paul A. Johnsgard
The History Of Life In Nebraska: A Time-Travel Adventure, Paul A. Johnsgard
Papers in Ornithology
It is difficult for humans, whose lives are measured in years and decades, to fathom the age of the Earth, whose history is patiently but inexorably written on thin pages of landscape, each lasting millions of years or more. As an exercise in Earth-time, let a single mile represent a million years. Thus .5 mile would represent 500,000 years, .10 mile equals 100,000 years, .01 mile (52 feet) equals 10,000 years; .001 mile (5.2 feet) equals 1,000 years, and about 6 inches equal 100 years. A decade would equal about half an inch. It is 450 miles from the 60th …
Comments On Nebraska's Falconiform And Strigiform Bird Fauna, Paul A. Johnsgard
Comments On Nebraska's Falconiform And Strigiform Bird Fauna, Paul A. Johnsgard
Papers in Ornithology
Owing to a lack of long-term survey data, determining whether Nebraska's raptor numbers are stable, increasing, or decreasing is difficult. Unlike our relatively well-monitored gamebirds, no regular surveys have been performed, and raptors barely register on the state's Breeding Bird Surveys or Christmas Bird Counts, owing to their relative rarity. However, a few data-points of interest do exist, which might be worth summarizing.