The Panda crossing in the United Kingdom was an early attempt at a signal-controlled pedestrian road crossing. The introduction of such a system was desired, to replace the zebra crossing, which had warning signals (in the form of Belisha beacons) but no proper controlling signals. The first trial installations started in 1962. A complex system of flashing traffic lights was used to dictate when vehicles should stop, and pedestrians could cross safely. The system proved unwieldy, and was superceded by the pelican crossing, introduced in 1969. A zebra crossing in Sydney, Australia A zebra crossing is a type of pedestrian crossing used in the UK and Europe, and increasingly around the world. ... Categories: Stub ... 1962 was a common year starting on Monday (link will take you to calendar). ... Traffic lights will sometimes differ where there are several lanes of traffic. ... Control panel at a pelican crossing A pelican crossing, (from Pelicon crossing: PEdestrian LIght CONtrolled crossing, a synonymous term) is a type of pedestrian crossing. ... 1969 was a common year starting on Wednesday (the link is to a full 1969 calendar). ...
Reference
BBC article (http://news.bbc.co.uk/onthisday/hi/dates/stories/april/2/newsid_2840000/2840919.stm), on the introduction of Panda crossings, and subsequent developments.
Also contributing to the development of genetic art is Joe Davis, a contemporary artist who works with DNA synthesis technologies.
He wrote: "By taking cell samples and exposing them to fluorescent dyes that bind to different parts of the chromosome, Chromos's scientists were able to discover which animals had accepted the chromosome.
When the mice carrying the extra chromosome were crossed with normal mice, it was inherited in exactly the same way as the animals' natural chromosomes." This is an indication that human germline gene therapy is becoming a practical possibility.
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