Science Stories

Superstrings was a very popular topic among physicists in the 1980ies. They had a renaissance in 1995 but then the researchers changed focus to other things. Now superstrings have gained new momentum in physics again. Professor Niels Obers from the Niels Bohr Institute explains what superstrings and string theory is. He also explains why superstrings are popular among researchers again. Science journalists Jens Degett is interviewing. Superstrings and string theory By Science Stories is licensed under a Creative Commons License.

Gravitational waves is a strange phenomena which was predicted already by Albert Einstein. To understand gravitational waves you need to understand gravitation. In this podcast professor Niels Obers describe gravitation in Newtonian terms and in the frame of Einstein's general theory of relativity. Both descriptions are incomplete but due to research with gravitational waves we may reach to a better understanding of these phenomena. Since 2015 where gravitational waves were first detected with certainty, a number of new gravitational wave detectors are being build and researchers are learning more about the ripples in time, space and the fabric of the universe. Science Journalist Jens Degett from Science Stories is interviewing professor Niels Obers from the Niels Bohr Institute at University of Copenhagen.

When someone begins to study the evolution of the universe and the laws of physics, one easily comes to wonder how strange it is that humans and life exist, and we are able to observe the universe. If the laws and constants of nature were just a little bit different, the occurrence of life is unthinkable. However, we can state that we are here, and this raises a number of other issues, such as: Has the universe always been able to sustain life? Will the universe continue to sustain the existence of life in the future ? Are we just one of many universes that exist in parallel? Science Journalist Jens Degett from Science Stories talks to Professor Niels Obers, Director of the Nordic Institute for Theoretical Physics (NORDITA) and professor at the Niels Bohr Institute in Copenhagen, to try and get to the bottom of the matter. This podcast is a continuation of their conversation in a former story "Big Bang challenged by Conformal Cyclic Cosmology".

We are used to think about the universe as a structure which started with a Big Bang and then expanded. Sir Roger Penrose, who received the 2020 Nobel Prize in Physics, has developed an alternative theory of the universe based on Einstein’s Theory of General Relativity which is called "Conformal Cyclic Cosmology". In this new model we don’t have one single Big Bang, but an iteration of infinite cycles (or aeons) of expansion and cooling, each beginning with a “big bang” and ending in a “big crunch”. Science Journalist Jens Degett interviews Professor Niels Obers, Director of the Nordic Institute for Theoretical Physics (NORDITA) and professor at the Niels Bohr Institute in Copenhagen, on Roger Penrose’s theory and how much evidence is needed in order to change the general view of a central paradigm which is written in our school textbooks. What if Penrose is right? What consequences or perspectives will it have for us?

This podcast on our living universe is recorded in Danish. We will try to make an English transcription as soon as we we can get a suitable transcription tool. Vores levende univers Der sker i disse år så meget inden for forskning især inden for biovidenskaberne. Vi studerer på livet løs hvordan liv fungerer, men hvad liv egentligt er, det er stadig et godt spørgsmål. Hvis man føler sig hægtet af, så er der en god anledning til at få et overblik over emnet lige nu - for Gunver Lystbæk Vestergård har skrevet en bog, som udkommer på Peoples Press i disse dage med titlen Vores Levende Univers - videnskabens søgen efter rumvæsener og alt livs oprindelse. Hør videnskabsjournalist Jens Degett interviewe forfatter og videnskabsjournalist Gunver Lystbæk Vestergård om hendes bog og hvad der i øvrigt sker med vores erkendelse af liv i universet.