3 Great Discoveries of 2014

What was a significant advantage of blue Light Emitting Diodes (LEDs) that led to their widespread use?

• They were easier to manufacture than red or green LEDs.

• They could convert electricity directly into light, making them energy-efficient.

• They produced a much brighter light than any previous bulb.

• They were the first type of LED ever invented.

What was the main limitation of traditional optical microscopes that scientists worked to overcome?

• They could only view dead cells.

• They couldn't achieve a resolution smaller than 0.2 micrometers.

• They required too much light to operate effectively.

• They were too expensive for most laboratories.

How did scientists overcome the resolution limit of optical microscopes to see individual molecules?

• By using stronger glass lenses in the microscopes.

• By developing new types of light that had shorter wavelengths.

• By inventing ways to turn the fluorescence of glowing molecules on and off.

• By cooling the samples to extremely low temperatures.

Which type of brain cells are responsible for creating a map-like grid of an environment?

• Place cells

• Grid cells

• Memory cells

• Hippocampus cells