eggs unlike their own? One possibility is that they are new hosts, with insufficient time to have evolved defences. The other is that defences are costly — for example, egg rejection may involve recognition errors — and parasitism levels may be below the threshold where it pays to sustain these costs. Even among host species that have evolved egg rejection, individuals are less likely to reject...

This year Molecular Biology of the Cell is publishing two special issues, this award issue and a second “quantitative biology” issue. In the award issue, MBoC’s tradition of publishing essays by ASCB award winners continues. These highly accomplished individuals inspire us with engaging stories of their lives and careers and share with us their considerable wisdom. The diversity of the career p...

The English word ‘Bible’ comes from the Greek word biblion. This word meant “roll” or “book”. It was usually a roll of papyrus or reed-like plant that was dried and fashioned into a writing material. This word occurs in the LXX copy of Daniel 9:2, and in Revelation 10:2. But today the word “Bible” means much more than just a book. It carries a sense of majesty as being the ultimate book par exc...

A symbol is a pattern (of physical marks, electromagnetic energy, etc.) which denotes, designates, or otherwise has meaning. The notion that intelligence requires the use and manipulation of symbols, and that humans are therefore symbol systems, has been extremely in uential in arti cial intelligence. keywords: symbol, reasoning, intelligence, representation, logic This article has two parts. W...

The aim of this study was to determine whether spontaneous respiration influences pulmonary artery input impedance, a question that has received little attention in the literature. Impedance values were assessed during three different phases of the respiratory cycle, namely inspiration, expiration and postexpiration (i.e. the null respiratory flow period between expiration and the next inspirat...