Bøger af Seth Tyler

¿¿Hope Comes Even Amid the Storms and Chaos¿After the unexpected loss of his wife, Seth Tyler was forced to learn how to manage being the solo parent of three grieving young boys, carry a career, and walk through his own grief. From the raw moments of his wife's death to figuring out how to live in their new shattered world, a message of hope and joy emerged from the chaos of such tragedy and provided hope of what can still come to be. Tyler discovered that in the midst of despair was joy. In the darkness of sadness, there was the light of happiness. And from the grief, there was growth. This book is not a "how to grieve" but a "how he grieved," and it uses his tragic story as an open journal for healing. This is a story of love, loss, and hope in order to help others in their darkest and most vulnerable times.

Turbellarian platyhelminths (or, as they are known now among cladistic systematists, free-living Platyhelminthes) comprise a widely distributed assemblage of lower worms found in marine, freshwater, and even occasionally in terrestrial habitats. The phylum Platyhelminthes may be more widely known for its parasitic members since the major parasitic groups of the tapeworms, flukes, and their relatives are more speciose and have greater impact on everyday human life; but the turbellarians are more diverse and, as inhabitants of virtually any aquatic habitat, are more widespread as well. Many of the lower turbellarians are rather simple in morphology and have served as models for ancestors of the Bilateria, i.e., the bulk of the animal phyla. Others are quite complex organisms, especially in the morphology of their reproductive systems which are highly specialized. The majority are free-living in aquatic habitats but a number of interesting parasitic and commensal species are found scattered among the higher turbellarian taxa. But turbellarians are more than just taxonomic curiosities. They have served as illustrative models in research on a variety of basic life processes. For example, their high capacity for regeneration has made them the subject of a large literature in developmental biology, the occurrence of mixoploidy and other karyological oddities among turbellarians has been important in understanding evolution of the genome, and the fine structure and biochemistry of the nervous system in turbellarians is revealing important principles of the organization of so-called primitive neural systems.