Scientists have found a surprising modern-day symbiosis between 2 undersea animals, which had been gone from the fossil record for 270 million years.
Sea animal friends: A sea lily stalk with an anemone attached. This relationship was thought to have ended 273 million years ago. Image via Zapalski et al
We think of earthly life as evolving from the sea. But newly discovered microscopic “ball” fossils – found in ancient lake sediments in Scotland – suggest that evolution from single-celled to multicellular organisms might have occurred in lakes.
A podcast featuring Harvard theoretical physicist Avi Loeb, on the subject of whether ‘Oumuamua – the strange object that swept through our solar system in 2017 – is an artifact of an alien intelligence.
https://www.flickr.com/photos/juergo/28366289953/. Jürgen Telkmann/Flickr
Sometimes Mars is bright like a dot of flame. Other times, as in May 2021, Mars appears inconspicuous among the brighter stars. Why?
View at EarthSky Community Photos
. | Abigail Atienza wrote: "I just want to share a photo of the waning gibbous moon
and the red planet Mars (on the right) with the northern lights in Iqaluit, Nunavut, Canada. September 6, 2020, 9:20 p.m. Road to Nowhere." Thank you, Abigail!