Activity for Bruceā
Type | On... | Excerpt | Status | Date |
---|---|---|---|---|
Answer | — |
A: How do you know you have reached North or South Pole without GPS? Take a time-lapse photo of the sky directly overhead at night. The moving stars will form circles in your photo, and if the center of the circles is directly overhead, you are there. (more) |
— | almost 6 years ago |