She’s gotta habit

You gotta believe

I argue that proper assertion requires belief. Jennifer Lackey has recently argued otherwise. Here I respond to Lackey’s argument and provide positive evidence that permissible assertion does require belief. The positive evidence takes the form of an explanatory argument from linguistic patterns surrounding the give and take of assertion. Looming large in the background of the discussion is whe...

A new acoustic tailbeat transmitter for ®shes

A new acoustic transmitter for monitoring the tailbeat frequency of free-swimming ®shes and sharks is described. The transmitter is externally mounted on the ®sh's caudal peduncle and produces an acoustic pulse with every lateral movement of the tail. Field tests on obligate-swimming juvenile scalloped hammerhead sharks (Sphyrna lewini) show these transmitters accurately telemeter tailbeat de ̄e...

We All Gotta Go Sometime

Trembling aspens (Populus tremuloides) are among the world’s most remarkable trees, forming vast clones that can live an improbably long time. These clones share a common root system, from which new trees arise, cover up to 43 hectares and persist up to a million years. The vigor of these ancient plants belies their years, leading to speculation that they defy aging or senescence. But demonstra...

Iron chelation therapy: you gotta have heart.

Crystal Habit Modification Using Habit Modifiers