Anyone who has ever seen the computer animation of the processes occurring inside a living cell titled Inner Life of a Cell (produced by Harvard University) has marveled at the kinesin motor which transports organelles through the cell by "walking" along microtubules. This video explains some of the amazing complexity involved in this process and how the kinesin performs its "walk":
If you've never seen the animation of the kinesin in the Harvard video it's at the two minute mark here:
Please keep in mind that everything you see here is solely the end product of many fortuitous convergences of chance mutations and natural selection. Anyone silly enough to think that such precision, complexity, and design requires an intelligent agent to engineer them is simply not thinking scientifically and should consult with Judge John Jones of the 2005 Dover School Board trial who is an expert on these matters and who will be able to school you in the proper way to understand them.
HT: Evolution News and Views