Biopedia

A silly question today- if you were to add together all of the X chromosomes of all of the people in the world, what would their total mass be? To answer this, we are going to have to estimate the mass of an X chromosome, examine how many cells are in a human body, and just how many people there are in the world…

Sources for this episode:

• Bhartiya, A., Batey, D., Cipiccia, S., Shi, X., Rau, C., Botchway, S., Yusuf, M. and Robinson, I. K. (2021), X-ray Phytography Imaging of Human Chromosomes after Low-Dose Irradiation. Chromosome Research 29: 107-126.
• Ross, M. T., et al. (2005), The DNA sequence of the human X chromosome. Nature 434: 325-337.
• Sender, R., Fuchs, S. and Milo, R. (2016), Revised Estimates for the Number of Human and Bacteria Cells in the Body. PLoS Biology 14(8): e1002533.
• Tartaglia, N., Cordeiro, L., Howell, S., Wilson, R. and Janusz, J. (2010), The Spectrum of the Behavioural Phenotype in Boys and Adolescents 47,XXY (Klinefelter Syndrome). Pediatric Endocrinology Reviews 8(1): 151-159.
• Author unknown, Bionumbers (date unknown), Mass of X and Y chromosomes (online) (Accessed 14/12/2025).
• Author unknown, Worldometer, (date unknown), World Population Clock (online) (Accessed 14/12/2025).
• Author unknown, UNICEF (date unknown), How many children are there in the world? (online) (Accessed 14/12/2025).

Generation Beta is, according to futurist Mark McCrindle, just starting to appear in the world. So, today, let's examine the generations that have been given a label in societal consciousness since the Lost Generation all the way back in the late 1800s.

Sources for this episode:

TBA

Today, we are going to examine a paper studying the impact both age at first pregnancy and the interval between pregnancies has on the probability of various negative outcomes associated with childbirth.

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TBA

Charles Darwin makes his way south from Rio de Janeiro to Maldonaldo and the south of South America. Along the way, he witnesses some local activities and has time to show off technological marvels to the locals.

NOTE: I have found out since recording that St Elmo's light or fire is a weather phenomenon in which plasma appears around anything with a structure like a rod in a vehicle, such as the mast of a ship or the wing of a plane (St. Elmo's fire Wikipedia 04/11/2025). I have also discovered that $2 in 1832 money is worth $75.34 in 2025 money ($2 in 1832 → 2025 | Inflation Calculator 04/11/2025).

Sources for this episode:

TBA

In a sort of unofficial Part II to our discussion in episode 112, we are going to examine the data from the 1790 US census focussed on the towns of Danbury and Brookfield in Fairfield County, Connecticut. We will be using the data for each household to answer two questions- does the ratio between males and females deviate significantly from 50:50? And what is the average family size?

Sources for this episode:

TBA

Something a bit different today- we are going to be following up from our discussion of namesaking and looking at suffix chains! Examples of links in such chains would include people like Theodore Roosevelt VII or John Smith III. Let’s look at some real-life data- including data from the 1790 US census- to ask one question: how common or rare is each new link in the chain?

Sources for this episode:

TBA

Today, we will be wiping out humanity to ask a simple question- what would happen if there really were only two people left to repopulate the planet? Let's meet our hypothetical protagonists Cornelius and Cornelia, and in the first part of this scenario we will examine how many children the pair could realistically have given certain assumptions.

Sources for this episode:

TBA

A few weeks ago in episode 108, we talked about the largest species of snake to ever exist. Well, today we are travelling to the other end of the size spectrum to talk about the smallest snake in the world. This is Tetracheilostoma carlae, the Barbados threadsnake- which was thought to have gone extinct until the year 2025…

Sources for this episode:

TBA

Throughout history, there have been several claims of unusual longevity. For example, Pliny the Elder mentions several cases of people claiming to be 140 in a first century CE census. Moreover, there is a man in England who supposedly died at the age of 169 in 1670. However, they don't quite compare to the case of Colestein Veglin from July 1876.

Sources for this episode:

TBA

Previous episodes of the podcast have established the precedent of examining specific species or taxa. On today's episode, we are going to examine a snake. Not just any snake- the biggest snake to have ever lived…

Sources for this episode:

TBA