Wiskunde en Natuurwetenschappen, Instituut Biologie Leiden (IBL)

How did toxin genes evolve from harmless physiological genes?

Evolution & Biodiversity is one of the four research themes of the Institute of Biology Leiden.

The HARVEST project explores the dietary choices that our hominin ancestors and relatives made, by recovering information on what they consumed, and how factors like environmental variation, intrinsic biology, and development of food processing technologies could have influenced their decisions.

The Great Rift Valley in Africa is a real treasure trove for discovering early human fossils. The fossils found in this part of Africa have determined our view of human evolution. But was the Great Rift Valley really the place where evolution took place or just a place where fossils are well preserved…

Studies in Human Evolution is a series of the Faculty of Archaeology, Leiden University and The Max Planck Institute for Evolutionary Anthropology, Leipzig.

Why do plants produces always produced so many slightly differing metabolites within a particular chemical class?

Microbial Sciences' contribution to the Evolution & Biodiversity research theme focuses on understanding how bacteria sense and respond to their environment, and how bacterial diversity and evolution is influenced by cooperative and antagonistic interactions taking place between microbes.

Despite the field’s general agreement that pyrotechnology had a significant impact on the cultural evolution of humankind, our understanding of the origins and development of fire use and its role in humankind’s cultural evolution is very limited, blurred by strong disagreements over its chronology…

Animal Sciences’ contributions to the Evolution & Biodiversity research theme include evo-devo research, the evolution of cognitive and behavioural traits, and the evolutionary mechanisms of stress adaptation. This research involves both indoor and outdoor studies.

Plant Sciences' contribution to the Evolution & Biodiversity research theme is to understand what are the key drivers of plant biodiversity during evolution with a focus on plant life history and resilience traits and develop tools to restore and maintain plant biodiversity.

How has early development in R. ocellatus been modified as a result of its parasitic embryonic lifestyle?

Negotiation can only really be an alternative to warfare, if the parties agree on a framework of rules and procedures. And if the confidence of the partners may increase in another. But negotiations continue to wage war by peaceful means.

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.

Female and male songbirds sing equally elaborate songs in some species, but in others, females do not sing like males or not at all. How did such pronounced differences in male and female communication evolve?

In order to compare languages, it is important to have a thorough knowledge of the specific languages you are studying. Gijsbert Rutten and his team are investigating the origin of Standard Dutch and the repression of ‘non-standard’ variants between 1750 and 1850.

The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L.B.F.M. Waters (UvA), Prof.dr. C. Dominik (UvA)

Promotor: S.M. Verduyn Lunel, Co-promotor: O. van Gaans

Sustainable energy from wind and solar is most readily available near the sea.

Promotores: Prof.dr. M. Franx & Prof.dr. P.G. van Dokkum (Yale University)

Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.

Are traces of fire use detectable in ancient hominin genomes?

The thesis is about the study of shell evolution of the Hydrocenidae of the genus Georissa. This thesis started with a general overview on the evolutionary process of animals due to ecological changes.

Promotor: Prof.dr. H.J.A. Rottgering, Co-promotor: David Sobral

Promotor: Prof.dr. M. Schilthuizen

A study by a Leiden-Wageningen group shows that present-day humans are biologically poorly equipped to deal with the toxins they are regularly exposed to in smoky environments: compared to earlier hominins, we modern humans are probably even worse off. The study appeared in Molecular Biology and Evolution.…

This interdisciplinary research project explores several adaptive machine learning methods which can give insight into the interaction between human and machine. The ultimate goal is open and natural communication between humans and AI that should result in mutual trust, cooperation and coordination…

The growing demand of energy indicates that global energy resources in the form of fossil fuels will not be sufficient in the future. In order to solve potential future energy problems development of a sustainable hydrogen economy is highly desirable.

We have examined sequences from the ligand-binding domain of the nicotinic acetyl choline receptor (nAChR) in 148 vertebrate species. We are in interested in this receptor because the α-neurotoxins of many venomous snakes binds to this receptor in its location at the neuromuscular junction in all ve…

Bicarbonate buffer is largely found in nature due to its ability to regulate pH variations around neutral values. As the pH changes, so does the speciation of the buffer.

Research into the evolutionary backgrounds of our diets can help us make the right choices in diet, health and lifestyle.

Promotor: S.M. Verduyn Lunel, Co-promotor: O.W. van Gaans

Birds sing to be heard, but how do they cope with increasing noise levels? Which species persist in cities and why? And do they thrive or suffer in the urban soundscape?

To gain more insight into the evolutionary development of orchid flowers and fruits, the orchid species Erycina pusilla was studied. The evolutionary origin of the median petaloid sepal, the callus on the labellum, and the stelidia was studied.

What is the relation between the experience and the act of exclusion?

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

This thesis has shed light on some of the ways in which the local electrolyte composition can differ from the bulk and how these changes in the local reaction environment can determine the activity and/or selectivity of two important electrocatalytic reactions, namely, electrochemical CO2 reduction…

Planets are formed in disks of gas and dust around young stars.

This thesis investigates the structural evolution and assembly of galaxies since the first few billions years after the big bang.

In Slaving Zones: Cultural Identities, Ideologies, and Institutions in the Evolution of Global Slavery, fourteen authors—including both world-leading and emerging historians of slavery—engage with the ‘Slaving Zones’ theory.

Evolution is all around you every day. This is the message of a Massive Open Online Course (MOOC) of Leiden University and Naturalis that is offered free of charge to anyone interested.

Certain cichlid fish in Lake Victoria seem to have adapted super-fast to changing circumstances. Dr Frans Witte from the Integrative Zoology section has been awarded an NWO subsidy (approx. € 240,000) to carry out PhD research into the rapid changes apparent in this fish species.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

Plants produce an astonishing variety of secondary metabolites (SMs) which are thought to play vital roles in the fitness of plants through ecological interactions.

The consequences of social tendencies for the legislation and institutions in the fields of social security, the labor market policy and pension reform are examined in this multdisciplinary research program..

Intelligence of the crowd, or in other words, intelligence of a large, random collective, exists mostly in social media platforms such as twitter. The collective does not comprise (at least not necessarily) experts on crises, just regular people mostly. Nevertheless, there is valuable intelligence to…

Promotores: Prof.dr. P.M. Brakefield, Prof.dr. B.J. Zwaan (Wageningen Universiteit)