Age written in teeth by nuclear tests

Article Abstract:

The amount of radiocarbon present in tooth enamel as a result of nuclear bomb testing during 1955-63 is a remarkably accurate indicator of when a person was born. The enamel of individual teeth is formed at distinct, well-characterized times during childhood and it contains 0.4% carbon, allowing precise age determination.

Environmental aspects, Nuclear weapons, Nuclear testing, Age determination (Zoology), Age determination (Biology), Enamel, Dental, Dental enamel

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Printing of visual route memories

Article Abstract:

Trained ants either fed or left unfed were placed individually in a start-pot midway along the wall to investigate the role of feeding state in priming visual memories for the foodward or homeward route. It is concluded that the ants' feeding state determines whether foodward or homeward memories are primed.

Psychological aspects, Food and nutrition, Ants, Foraging, Foraging (Animal feeding behavior)

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