How about building blocks of life? Amino acids, remote sensing techniques, of course. And what about the disputed Mars meteorite with its Mars bacillum fossil? Huh?
Still, astrobiologists are scarce, but there is a ton of data and more arriving every day. There are also exobiologists and zenobiologists, and specialists within the fields. Don't forget the wheat experiment to be launched to the ISS, and the many experimental closed-loop life support systems being developed for Mars exploration. Astrobiologists are developing crops that will grow in the fields of Mars. That is a lot to keep up with.
Shouldn't that be xenobiologists?