One might at first tend to think that the growth of plants and animals, because of their elaborate forms, are ruled by highly complex laws. However, this is surprisingly not always true: many aspects of the growth of plants and animals may be described by remarkably simple mathematical laws. An obvious example of this are the seashells and snails, as we show here: with a very simple model it is...

concise and intensional periodic time expressions (Carnap 1947) instead of their extensional counterparts. This point gains in importance with the expansion of mobile and ubiquitous systems, which leads to an increased volume of such space and time located queries. Of course, information about local time and space can directly be captured from the mobile device, which places the call. Moreover,...

For nearly three hours, I'd been trying unsuccessfully to sleep. It was definitely not the most comfortable bed ever had—only a thin yellow and silver accordion-style pad separated my sleeping bag from particleboard platform bunk. I had no pillow; pillow too much of an extravagance haul up ten thousand feet. But glad opted for warmer, albeit slightly heavier, bag. Even though hard, it warm as c...

and hypothetical thinking skills do make group composition a less cumbersome process at this stage and significantly reworking choreography to make improvements becomes a possibility. Students can create dance compositions and then ask “What would happen if . . . .” The complexity of student creative work increases, as individuals are able to focus on four or more dimensions at once. This abili...