100 WVIA Way
Pittston, PA 18640

Phone: 570-826-6144
Fax: 570-655-1180

Copyright © 2025 WVIA, all rights reserved. WVIA is a 501(c)(3) not-for-profit organization.
Donate
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
Be Smart

Why Are There As Many Males As Females?

Season 6 Episode 5 | 5m 19s

In almost every animal species on Earth, equal numbers of males and females are conceived. Why is that? Especially in populations like lions or elephant seals, where most males don’t get to mate? That’s survival of the laziest, not survival of the fittest. It turns out that in most cases, an equal balance of the sexes is the evolutionary stable strategy.

Aired: 02/21/18
Extras
Watch • 12:37
Be Smart
(Almost) Everything You Learned About Genetics Is Wrong
Think traits like eye color or tongue-rolling are simple genetics? Think again.
Episode: S13 E13 | 12:37
Watch • 11:08
Be Smart
Mars Used to Be Blue... Then Something Happened
Why is the Martian sky red by day… but blue at sunset?
Episode: S13 E12 | 11:08
Watch • 36:47
Be Smart
Be Smart about Autism
Is autism really on the rise—or are we just recognizing it more?
Episode: S13 E11 | 36:47
Watch • 14:51
Be Smart
Why Seedless Fruit Is a Disaster Waiting To Happen
Seedless fruits are delicious, convenient… and completely unnatural.
Episode: S13 E10 | 14:51
Watch • 21:13
Be Smart
The Randomness Crisis Threatening the Internet
What does randomness really mean? And why your digital life depend on it?
Episode: S13 E9 | 21:13
Watch • 16:20
Be Smart
Blood Types Are Weirder Than You Think
Why do we have different blood types? And why do we have blood at all?
Episode: S13 E8 | 16:20
Watch • 16:18
Be Smart
How Feathered Dinosaurs Accidentally Invented Flight
How did dinosaurs become birds—and what good is half a wing?
Episode: S13 E7 | 16:18
Watch • 16:00
Be Smart
What Could We See with a Planet-Sized Telescope?
Just how big would a telescope need to be to actually see an alien world in detail?
Episode: S13 E6 | 16:00
Watch • 26:19
Be Smart
The Argument for De-Extinction: Explained
Dire wolves are back—sort of.
Episode: S13 E5 | 26:19
Watch • 16:53
Be Smart
Will Earth Run Out of Oxygen
The key enzyme behind photosynthesis isn’t actually all that great at its job.
Episode: S13 E4 | 16:53
Latest Episodes
All
  • All
  • Be Smart Season 13
  • Be Smart Season 12
  • Be Smart Season 11
  • Be Smart Season 10
  • Be Smart Season 9
  • Be Smart Season 8
  • Be Smart Season 7
  • Be Smart Season 6
  • Be Smart Season 5
  • Be Smart Season 4
  • Be Smart Season 3
  • Be Smart Season 2
  • Be Smart Season 1
Watch • 12:37
Be Smart
(Almost) Everything You Learned About Genetics Is Wrong
Think traits like eye color or tongue-rolling are simple genetics? Think again.
Episode: S13 E13 | 12:37
Watch • 11:08
Be Smart
Mars Used to Be Blue... Then Something Happened
Why is the Martian sky red by day… but blue at sunset?
Episode: S13 E12 | 11:08
Watch • 36:47
Be Smart
Be Smart about Autism
Is autism really on the rise—or are we just recognizing it more?
Episode: S13 E11 | 36:47
Watch • 14:51
Be Smart
Why Seedless Fruit Is a Disaster Waiting To Happen
Seedless fruits are delicious, convenient… and completely unnatural.
Episode: S13 E10 | 14:51
Watch • 21:13
Be Smart
The Randomness Crisis Threatening the Internet
What does randomness really mean? And why your digital life depend on it?
Episode: S13 E9 | 21:13
Watch • 16:20
Be Smart
Blood Types Are Weirder Than You Think
Why do we have different blood types? And why do we have blood at all?
Episode: S13 E8 | 16:20
Watch • 16:18
Be Smart
How Feathered Dinosaurs Accidentally Invented Flight
How did dinosaurs become birds—and what good is half a wing?
Episode: S13 E7 | 16:18
Watch • 16:00
Be Smart
What Could We See with a Planet-Sized Telescope?
Just how big would a telescope need to be to actually see an alien world in detail?
Episode: S13 E6 | 16:00
Watch • 26:19
Be Smart
The Argument for De-Extinction: Explained
Dire wolves are back—sort of.
Episode: S13 E5 | 26:19
Watch • 16:53
Be Smart
Will Earth Run Out of Oxygen
The key enzyme behind photosynthesis isn’t actually all that great at its job.
Episode: S13 E4 | 16:53