Today, you’ll learn about a study linking the Covid vaccine to slightly longer menstrual cycles. How being social could actually hurt people who are lonely, and why you won’t find any kangaroos outside of Australia. Find episode transcripts here: https://curiosity-daily-4e5364....4e.simplecast.com/ep Menstrual Length“Study Confirms Link Between COVID-19 Vaccination and Temporary Increase in Menstrual Cycle Length.” n.a. 2022.https://www.nih.gov/news-event....s/news-releases/stud in a Crowd “How To Deal With Loneliness: New Study Suggests That Social Contact May Not Be the Answer.” by Douglas Heingartner. 2023.https://www.psychnewsdaily.com..../how-to-deal-with-lo ‘Roos“Here's Why You Won't Find Kangaroos Outside of Australia.” by n.a. 2023.https://www.anu.edu.au/news/all-news/heres-why-you-wont-find-kangaroos-outside-of-australia“Paleoenvironments Shaped the Exchange of Terrestrial Vertebrates Across Wallace’s Line.” by A. Skeels, et al. 2023.https://www.science.org/doi/10.1126/science.adf7122“Australian Slang.” n.a. N.d.https://www.australianexplorer.....com/slang/places.ht Curiosity Daily on your favorite podcast app to get smarter with Calli and Nate — for free! Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers.