Have you seen the realm of Madrid lineup?

Colin Bridgerton's back.

With the undead and it's all about the Iron Throne.

You have to watch it.

What's it on? Bridgerton? Netflix.

The matches on TNT sports.

How should the dragon only on now?

Ugh, that's the one I don't have.

TV that flexes with what's trending?

New E.E. TV lets you add and remove subscriptions monthly.

Search E.E. TV requires E.E. broadband, 24 month contracts.

Content may vary terms apply.

This is Scientific Americans 60 Second Science. I'm Jason Goldman.

Human parents usually have one or sometimes two offspring at a time,

and when babies get delivered, we pour all our energy into trial rearing.

But other animals raise lots of babies at once, and the weaker individuals can be at a big

disadvantage.

If there's not enough food, for example, a mother bird might offer

more to those chicks who are more likely to survive. Nature is a rough place. But mammals like

pigs can't selectively provision their offspring the way birds do because all the babies

nourish at the same time. And yet, the strongest piglets still seem to have an edge. One hypothesis goes that the weaklings might not have enough energy

to stimulate the mammary gland while they suckle, so they eventually starve from a lack of nutrition.

...