THE KNOWLEDGE FEED

Amazingly, blue whales can slow their heart rate to four or five beats per minute in order to conserve oxygen during deep dives.

Amazingly, blue whales can slow their heart rate to four or five beats per minute in order to conserve oxygen during deep dives.

5 Questions: Mouth Music

Questions:5
Available:Always
Pass rate:75 %
Backwards navigation:Forbidden

The infinity sign is properly known as a "lemniscate."

The infinity sign is properly known as a "lemniscate."

5 Questions: Nose to the Millstone

Questions:5
Available:Always
Pass rate:75 %
Backwards navigation:Forbidden

Antarctica gets very little snow, so why is there snow on the ground? Because the snow that does fall on the continent never melts.

Antarctica gets very little snow, so why is there snow on the ground? Because the snow that does fall on the continent never melts.

5 Questions: A Tiny Lake

Questions:5
Available:Always
Pass rate:75 %
Backwards navigation:Forbidden

The first cellular phone measured 9" x 5" and weighed 2.5 lbs. It was developed by Dr. Martin Cooper, who worked for Motorola.

The first cellular phone measured 9" x 5" and weighed 2.5 lbs. It was developed by Dr. Martin Cooper, who worked for Motorola.

Morning Cup of Links: Surviving Lightning

Miss Cellania

5 Questions: Slinging Ink

Questions:5
Available:Always
Pass rate:75 %
Backwards navigation:Forbidden

Stephanie Kwolik's name might not ring a bell, but she's responsible for saving thousands of lives. In 1965, she invented Kevlar, the material used in bulletproof vests.

Stephanie Kwolik's name might not ring a bell, but she's responsible for saving thousands of lives. In 1965, she invented Kevlar, the material used in bulletproof vests.

5 Questions: Golden Girls

Questions:5
Available:Always
Pass rate:75 %
Backwards navigation:Forbidden

Pigs are no longer commonly employed to rustle up truffles; specially-trained dogs (who are equally adept at the job) have now taken their place.

Pigs are no longer commonly employed to rustle up truffles; specially-trained dogs (who are equally adept at the job) have now taken their place.

Brain Game: Get It While It's Hot

Sandy Wood

Pages