Inner Nature: Gene Snatcher
By Vidya Rajan, Columnist, The Times
In an earlier article[1] I wrote about tardigrades, a ubiquitous and indestructible animal with an extraordinary ability to endure adverse environmental conditions. This superpower is assisted by their entry into a dormant state called “tun”, in which they lose all their water and curl up into a husk. Tardigrades in the tun state can be subjected to boiling,...
Inner Nature: Did life originate at hydrothermal vents?
By Vidya Rajan, Columnist, The Times
The deep ocean floor is a desolate place: a desert with frigid waters, crushing pressures and inky darkness. But in the expansive and featureless wasteland are oases populated by bizarre life forms. These oases are located at hydrothermal vents, which were discovered in the mid-1970s but remained difficult to reach and to study for many decades. Recent technological...
Inner Nature: Merde!
By Vidya Rajan. Columnist, The Times
Merde. In other words, s**t, p**p, d**g, number 2, BMs, excreta, droppings, stools, feces. This is not a really pleasant subject of conversation, or even a polite one (unless you lived back in the eighteenth century when everyone was apparently fascinated by it as an indicator of health). But it’s an important part of life. If you’ve ever been constipated...
Inner Nature: Virgin Births
By Vidya Rajan, Columnist, The Times
December seems a good time of year to bring up the topic of virgin births. Religion aside, this is actually an interesting and significant biological topic. Curiously, virgin births have been documented in all vertebrates with jaws with the exception of mammals. To be clear, the majority of organisms on this planet – single celled bacteria and protists –...
Inner Nature: Sentience
By Vidya Rajan, Columnist, The Times
Two books released over the last two years: Lars Chittka’s “Mind of a Bee” and Stephen Buchmann’s “What a Bee Knows: Exploring the Thoughts, Memories and Personalities of Bees” have thrown into turmoil the question of sentience – the capacity for feelings – of honeybees, and whether we humans truly understand the capabilities of minds that operate...
Inner Nature: Poisonous and venomous animals
By Vidya Rajan, Columnist, The Times
I am in India. It’s a vibrant and bustling place. This month, a couple of friends and I are planning a trip to a wildlife sanctuary in Southern India*. We hope to see tigers and a plethora of other animals and plants.
What I am hoping we do not encounter closely are mosquitoes and snakes. I do not like mosquitoes, but I do like snakes, in principle. But many...
Inner Nature: Gender — sex made visible
By Vidya Rajan, Columnist, The Times
Charles Darwin concluded his seminal “Origin of Species by Means of Natural Selection” with this immortal paragraph: “Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers,...
InnerNature: Sex — The key to diversity
By Vidya Rajan, Columnist, The Times
In his book “Evolution: The Triumph of an Idea,” Carl Zimmer concedes: “Sex is not only unnecessary, but it ought to be a recipe for evolutionary disaster. For one thing, it is an inefficient way to reproduce…And sex carries other costs as well…By all rights, any group of animals that evolves sexual reproduction should be promptly outcompeted by nonsexual...
Inner Nature: Immunity — Autosurveillance
By Vidya Rajan, Columnist, The Times
The immune system is the mechanism that protects and defends the body. Although its main purpose is defense against attack, the immune system is also a barrier, border patrol, soldier, police, doctor, parent, and amazingly, a fortune-teller, all in one package. Not only that, it exists in every living organism from bacteria to plants to animals to protect against...
Inner Nature: Digestion and food processing
By Vidja Rajan, Columnist, The Times
The previous group of Inner Nature articles were loosely organized around how organisms sense the external environment using vision, sound, touch, taste and smell. What is most remarkable about this cluster of what appears to be completely different mechanisms is the profound underlying similarity. This similarity is due to the outcome of notionally different...
