Hello and welcome to the Intelligence on Economist Radio. I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

Tiberculosis is still one of the world's biggest killers. A couple of decades ago it was

nearly wiped off the earth, but it stuck around and resists treatment as it keeps mutating.

We take a look at the development of new tools to fight an old disease.

And science is riddled with persistent mysteries. How will the universe end? Why is gravity so

weak? And what exactly is this sex life of eels? Believe it or not, no one really knows.

Our correspondent dives deep to make himself more eel-informed.

First, widespread and sometimes violent protests have gripped India.

An issue is new legislation that on paper seems commendable. The government wants to make it

easier for refugees from neighboring countries to gain citizenship. But the detail of the

new law has upset many. It says that some people will be on a fast track to naturalization,

provided they're from certain religious communities. But Muslims will receive no such benefit.

Critics say it's part of a Hindu nationalist agenda to marginalize India's more than 200

million Muslims. And it has many Indians worried that the country's secular constitution

is being eroded.

So in response to the government's decision to amend India's citizenship laws, there

have been protests all across India. I'd admit, Bride is our Asia editor.

What's striking about these protests, India's a fissiporous country, as they like to say,

there are often protests about various things. But what's striking about these protests is,

first of all, they, as I say, have been all across the country. In parts of the country

that you may not have thought would have felt that strongly about this change to the citizenship

...