Biology A–Z: A

Topic
A new species of small bird?

Could scientists have discovered a brand-new bird species hiding among familiar forest birds?

Are all emerging viral diseases of the past 100 years zoonoses?

Explore how many new viruses come from animals—and why this might not always be the case.

Are humans more adapted to "light mode" or "dark mode"?

Explore how human vision has evolved over time and whether we're naturally suited for bright screens or dim ones.

Are humans the only species who drink milk as adults?

Discover how humans are unique among animals for continuing to drink milk into adulthood, and what other species do instead.

Are male and female brains physically different from birth?

Discover whether boys and girls are born with different brain structures, and what that might mean for development.

Are the social-distancing measures implemented against SARS-CoV-2 also suppressing?

Discover how the virus-fighting strategies of the pandemic may have had unexpected effects on other germs.

Are there organisms with fewer than 1000 neurons?

Discover if there are organisms that manage to live and thrive with far fewer than 1000 neurons.