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We hide to observe animals all the time.

• lolc 7y ago
  Most of the time we don't.
• dylan604 7y ago
  We also install remote/un-manned viewing platforms all the time. They sometimes require us to revisit them periodically to collect the data and load fresh media/power/etc. Then we upgraded them to use solar to replenish power, and installed wireless communications to make it so we don't have to visit. Maybe we just need to start listening for rogue broadcasts from our planet for these ET-phone-home devices?