Topic Title Teaser text Availablity
Why emit light? The many functions of bioluminescence n/a Available
Miniaturised interstitial protists and metazoans n/a Not Available
Secondary xylem (wood) in vascular plants

Evolution of wood in plants as distantly related as lignophytes, Calamites and Lepidodendron is an elegant example of convergent evolution. Plants responded in a similar way to a need for better structural support as they diversified and increased in size.