The first microscope -- invented around 1595 -- was only as strong as a magnifying glass.

Look and learn: Entomologists use these simple tools while doing fieldwork.

Look and learn: This insect-collecting tool uses suction.

Look and learn: Scientists use this tool to collect specimens.

Look and learn: This simple technique takes advantage of a natural insect characteristic.

Look and learn: Take a peek at what scientists see through one of these scientific tools.

Look and learn: See how this tool works.

Look and learn: This powerful microscope produces extremely detailed 3-D images.

Look and learn: How do scientists collect detailed genetic code?

A historic South American cruise led to groundbreaking findings about the wild kingdom.

See what kids asked and what the scientist revealed.