Four Kilometres Down

Ahtautua sisään (luukusta)

To fold yourself through (a hatch)

Havaita

To detect (a plume of warm water)

Hiipiä johonkin

To creep into (the cabin)

1. What does the text mainly do? — It gives a first-person account of a dive to a newly found vent and the life around it
2. Why did the team dive at this particular spot? — A survey had noticed unusually warm water rising from the bottom
3. In the first paragraph, the warm water plume is called the vent's "calling card". This means the plume was — a telltale sign that the vent existed