Jun 8, 2021
Death by Primordial Black Hole
In the infant universe, a substantial enhancement in the radiation density on the scale of the cosmic horizon could have made some small regions behave as a closed universe and...
May 31, 2021
Maybe Dark Matter Is More Than One Thing
The label “dark matter” encapsulates our ignorance regarding the nature of most of the matter in the universe. It contributes five times more than ordinary matter to the...
May 18, 2021
When Scientific Orthodoxy Resembles Religious Dogma
When my Harvard colleague Stephen Greenblatt saw my book Extraterrestrial featured on the cover of the Orthodox Jewish magazine Ami, he commented “It is interesting that the...
May 13, 2021
How Much Time Does Humanity Have Left?
My advice to young scientists who seek a sense of purpose in their research is to engage in a topic that matters to society, such as moderating climate change, streamlining the...
Apr 8, 2021
When Did Life First Emerge in the Universe?
About 15 million years after the big bang, the entire universe had cooled to the point where the electromagnetic radiation left over from its hot beginning was at about room...
Sign up for RC newsletters
Do Not Sell My Personal Information
Go to full site