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.

Tuberculosis 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.

But first... dives deep to make himself more ill-informed.

But first, widespread and sometimes violent protests have gripped India.

At 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. Edward McBride is our Asia editor.

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

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