Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Or search for something specific

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Biology

Sexual Selection and the Evolution of Exaggerated Ornaments in Birds-of-Paradise

Quick fact

Some male birds-of-paradise perform courtship dances that last for hours, and their feather ornaments can be longer than their entire body, yet females often inspect only a few males before choosing a mate.

Why this is interesting

In the forests of New Guinea, males of some bird species are so dazzling that early naturalists thought they were visitors from paradise. Yet these same males pay a heavy price for their beauty—making them easier for predators to spot. How did such extravagant traits ever evolve?

Private administrator preview

Subjects · study & training · careers

What would you like to explore?

Choose something you are considering. FACTREE will give you a clear picture of what it contains, how its main parts connect and where it could lead.

This private catalogue connects 31 subjects, study routes and careers across six broad areas. Public Maps and learner routes remain off.

Curiosity quiz

What do you already know?

One question at a time. A wrong answer is simply another way into something worth knowing.

Science & medicine

Question 1

Finding a question for you…

Administrator

Manage FACTREE.

Review learner demand, card visibility and private knowledge-architecture evidence.

Profile

Sign-in & security

Sharing

Your data

Your next discovery is one click away.

Sexual Selection and the Evolution of Exaggerated Ornaments in Birds-of-Paradise

Let a fact find you.

Stop FACTREE emails?

You’re unsubscribed

What would you like to explore?

Choose a subject

Programming

Programming

What do you already know?

Finding a question for you…

Manage FACTREE.

Choose a path

Discovery coverage workbench

Choose a subject

Continue exploring