Most frightening and/or depressing story: For people who just don’t care that much about plants and animals, the elevator pitch on climate change is it is coming for our houses and it is coming for our food and water.
Most hopeful story: It is possible that mRNA technology could cure or prevent herpes, malaria, flu, sickle cell anemia, cancer HIV, Zika and Ebola (and obviously coronavirus). With flu and coronavirus, it may become possible to design a single shot that would protect against thousands of strains. It could also be used for nefarious purposes, and to protect against that are ideas about what a biological threat surveillance system could look like.
Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both: At least one serious scientist is arguing that Oumuamua was only the tip of an iceberg of extraterrestrial objects we should expect to see going forward.