Astronomy current events question: iron-60 "stardust" found in Antarctica

Astronomy 210L, fall semester 2019
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)

Lisa Pietrzyk, "Stardust in the Antarctic Snow" (August 20, 2019)
tum.de/nc/en/about-tum/news/press-releases/details/35654/

__________ found in snow from Antarctica provides evidence that a massive star exploded nearby 40,000 years ago.
(A) Helium-3.
(B) Dark matter.
(C) Unstable iron.
(D) Fossilized mammoths.
(E) Oil and shale deposits.

Correct answer: (C)

Student responses
Sections 70178, 70186
(A) : 5 students
(B) : 0 students
(C) : 28 students
(D) : 1 students
(E) : 5 students