I would write a scientific blog on any scientific topic. The average length of the article is going to be 1000 words but I might write longer articles without charging extra, but that is only if I really like the topics and get more than 1 orders from you.
Plus, the clients have the liberty to decide the tone of the articles; whether they want it to be serious and professional or whether they want it to be casual and playful, I can do both.
Book / Ebook
1000 word article
I'll write a 1000 word article on any scientific topic