They are willing to acknowledge that diatoms appear to be designed, but they chalk this design up to evolution.
These algae are effective, producing 20–30% of all oxygen through photosynthesis. And, as there are some 100,000 species of these industrious workers, we can enjoy all the oxygen we need.
In a paper published in the journal Scientific Reports, eight researchers admit that they don’t know how diatoms could have evolved. The best they can come up with is convergent evolution, which is Darwin-speak for we haven’t a clue.
Aguirre, Luis Ever et al. 2018. Diatom frustules protect DNA from ultraviolet light.Scientific Reports 8:5138. (23 March).