Modelling suggests that donating half of existing vaccine production to poor countries would protect the world (as a whole) faster from Covid-19, as it would reduce the development of new variants, some of which will surely be dangerous.

The question does not need to be asked if we eliminate the artificial obstacles to producing vaccines much faster. Or, for example, if the new American libre vaccine or the Cuban vaccine does the job.

A few percent of antivaxxers have pressured the UK into allowing unvaccinated medical workers to stay on the job and interact with patients.

This is dangerous for the patients, as well as for their coworkers. The system could compensate for this weakness by testing all the workers frequently — perhaps every other day.

The House investigation of the Jan 6 attack on the Capitol is strangely soft on most of the people who have refused to testify.

Statistical techniques suggest that there are probably 9.000 species of trees that are unknown to science, and around 3,000 of them are rare.

Some of them may never have been recognized by any human being.

A US appeals court ruled that when electric utilities cut what they pay homeowners for their solar energy, this can constitute unfair competition.

That decision can be very important for reducing the US carbon footprint if it isn't reversed by right-wing judges.