The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astrophysicist, science communicator & NASA columnist.
The world’s first suspended traffic circle… for bicycles!
And — if you aren’t — why you should be watching.
One of the only members of the Virgo Cluster… that isn’t located in Virgo!
Seven of the greatest and most entertaining achievements of human ingenuity.