Add spaces: -Upto70%coverageofwhitehair;

Answer: - Up to 70% coverage of white hair ;

Add spaces: Sciencewithanewhorizon

Answer: Science with a new horizon

Add spaces: Theywererequiredtosupplyadossierabouttheirparents,listingtheir“dominantpassions,”andtospyoneachother.

Answer:
They were required to supply a dossier about their parents, listing their “dominant passions,” and to spy on each other.