Badri Sunderarajan

Badri lives on a farm in rural Tamilnadu, India. He prefers low tech to high, but still programs when he's not writing letters. Reading is his default state of being (often with a cat on his back).

Predatory Signals

Brain Manipulation

Predatory Signals

The kudu antelope explains how and when to eat.

Drawing with Lines

Drawing with Lines

Introducing vectors, the hidden arrows that make your images sharp.

Money from the Future

Money from the Future

How does money travel in time? Here are the details.

Time Travel

How banks make money by borrowing it from the future.

A Trap for Cars

A Trap for Cars

Learning to drive is not easy. Especially if you’re a car.

The Round Plants

The Round Plants

They can rise when they’re hungry. They can sink when they’re thirsty. And they prefer things with a pinch of salt.

Legal People

What’s a person? The answer’s not nearly as simple as you’d think.

Taking Charge

Electric cars. How do they work? How do they feel? What would it be like to own one?

Riding Batteries

Riding Batteries

As we gear up for electric cars, a smaller revolution has gone relatively unnoticed.

Tesla’s Master Plans

Tesla’s Master Plans

From Eberhard to Elon Musk, the short but swift history of the world’s most innovative car-company.

Automobile Industry

The Early EVs

Thomas Parker made his electric car in 1874. So why aren’t they more widely used today?

Driving (Petrol) Away

Driving (Petrol) Away

Countries around the world are pushing for an electric future. But they’re doing it for different reasons.

Plugging-in India

Plugging-in India

India plans to make all new cars electric by 2030. Will it work?

Bullet Journals

Bullet Journals

Is your planning system working? Or is it just another item on the to-do list?

Dodging Microwaves

Dodging Microwaves

Stuck in a microwave oven? Here’s how not to get cooked.

Beyond Passwords

Beyond Passwords

From door-latches to iris-scans, the art of blocking people has gone a long way. And it’s still going.

Horn OK Please

It’s written on practically every Indian lorry. But what does it mean?

Cleaning your Inbox

Cleaning your Inbox

Messages may get lost in the post. But you can at least stop them getting lost in your email.

Eating Dishes

What if the main dish was really a dish?

A Ball of Water

A Ball of Water

Imagine if you could pick up a drop of water, and carry it, just like that?

The Scaley Trees

The Scaley Trees

Before leaves, and before coal, there lived the Lepidodendron.

The Blinding Noise

The Blinding Noise

Why do whales get beached? Now we know.

Types of Pasta

There are hundreds of different kinds of pasta — you’ll never be able to remember all of them!