Thursday, 17 April 2008
"Bisphenol A, a chemical that leaches into food and beverages from many consumer products, causes normal, non-cancerous human breast cells to express genes characteristic of aggressive breast cancer cells. That’s the finding of a “Priority Report” in the latest issue of the journal Cancer Research, the official journal of The American Association for Cancer Research. " www.sciencedaily.com
Wednesday, 16 April 2008
Tuesday, 8 April 2008
The autumn equinox
It is that time of the year again when all geostationary satellites suffer from a phenomenon known as 'solar transits' or 'sun outages'. These events occur twice a year over several successive days after the autumn equinox in March, and before the spring equinox in September, when the sun crosses the equator.
At this time, the sun passes behind the satellite as seen from the Earth Station. The high energy from the sun overpowers the very small signal from the satellite during this time, and causes service degradation to total outage for up to 10 minutes. The precise effect on received services depends on the size of the dish, and on the exact tracking path of the sun relative to each earth station.
Monday, 7 April 2008
The ISS orbits at about 350km above the earth, while the moons orbit is approximately 340,000km. The ISS circles the earth 15.8 times per day. Currently three humans live in the station which has had permanent human presence since 2000.
I have new interest in space stories ...
Friday, 4 April 2008
Apparently researchers have managed to ascertain that while rats may have a notion of tinme passing, they do not pointpoint their memories in time http://communications.uwo.ca/com/media_newsroom/media_newsroom_stories/are_animals_stuck_in_time?_20080403441999/
So they can remember they've already eaten but couldn't tell you when last year that had a particularly tasty morsel? I wonder if this will have implications in pest management...