Saturday, 25 February 2012
Saturday, 18 February 2012
Friday, 17 February 2012
Thursday, 16 February 2012
Wednesday, 15 February 2012
http://www.bbc.co.uk/iplayer/episode/b01c8b5t/How_to_Grow_a_Planet_The_Power_of_Flowers/). The second episode suggested that flowers had driven the development of colour vision in primates, by using colour to signify ripe fruit. One should note, additionally, that some uses of red mean poisonous rather than ready to eat. Even so, it is extremely unlikely that cones in the retina came about solely as a result of manipulation by flowers. Colour vision is important in other sets of circumstances (finding a mate and locating animal prey) and it is much more likely that the plant's signals and the primate detector systems drove each other in evolutionary terms.
http://www.guardian.co.uk/environment/2012/feb/14/washington-deer-cull?INTCMP=SRCH). The Bambis stand accused of causing major damage to forested areas, including completely preventing regeneration by eating seedlings. Accommodating deer within such systems (a relatively small, confined space with no real predators) is difficult as the carrying capacity is likely to be very limited.
Saturday, 11 February 2012
Thursday, 9 February 2012
Tuesday, 7 February 2012
http://www.guardian.co.uk/science/2012/feb/06/mating-call-extinct-bush-cricket?INTCMP=SRCH). This large insect, it has been deduced from fossil evidence, would have produced a 6.4 KHz mating call, which would have been clearly in the human hearing range (many current bush crickets, like the one illustrated, produce calls nearer 20 KHz).
Bees are very important insect pollinators. Some species are, of course, also commercially-important because they produce honey and bees-wa...
A combination of night rain and day-time sun has resulted in more Bynea blooms. The Southern marsh orchid ( Dactylorhiza praetermissa...
Flies (Diptera) can be quite impressive on a snow-white back drop. I show a number of candidates I have encountered on my travels.
The fuss about allegedly suspect data emanating from the East Anglia University Climatic Research Unit and the 'theft' of emails fr...