The first question at any boundary is what it is made of, because that was decided entirely by what was to hand. The second is what shape it is, which…
The defining property is that nothing here is constant. Salinity at any given point changes twice a day and again with the seasons, and every organism and process in an…
There is a long-standing assumption in how intelligence gets discussed, and corvids are the clearest available argument against it.
The assumption is that sophisticated cognition requires a particular kind of…
There is an assumption embedded in ordinary language about growing old, and it is worth examining because it turns out to be misleading.
The assumption is that ageing is what…
Most complicated biological structures are alive. They are supplied with blood, monitored by nerves, maintained continuously and repaired when damaged.
A feather is none of those things. Once grown, it…
Most descriptions of the ocean concern its surface, which is understandable, since that is the part anybody sees.
The surface is a thin film on top of something much larger.…