Whose sperm is longer; a mouse or an elephant?

Whose sperm is longer; a mouse or an elephant?

Longer sperm often seem to have a competitive advantage. However, a study now reveals that the size of the animals also matters. The larger the animal, the more important the number of sperm is relative to sperm length. That’s why elephants have smaller sperm than mice.

Do carrots help your eyesight?

For example, a diet of carrots won’t give a blind person 20/20 vision. But the vitamins found in the vegetable can help promote overall eye health. Carrots contain beta-carotene, a substance that the body converts to vitamin A, an important nutrient for eye health.

What fears are we born with?

It is a common misconception, as people are born with only two fears – of falling and of loud noises. These two fears are incorporated in the human DNA and have become a mechanism for survival which is passed to new generations.

Why are your lips red?

Your lips’ red or pink pigment comes from underlying blood vessels — red-colored, blood-filled capillaries are close to the thin skin on your lips. The transition of the reddish-pink outline of your lips to the rest of the skin is called the vermillion border, and it’s found only in humans.

What country has the most borders?

China has the maximum number of neighbours touching its border. The 14 countries touching its border are: India, Pakistan, Afghanistan, Tajikistan, Kyrgyzstan, Kazakhstan, Mongolia, Russia, North Korea, Vietnam, Laos, Myanmar, Bhutan and Nepal.

How many children did Albert Einstein have?

He was married to Mileva Marić between 1903 and 1919. They had three children, Lieserl (born 1902), Hans Albert (born 1904) and Eduard (born 1910). He married Elsa Löwenthal in 1919 and they lived together until her death in 1936.

How long is a day on the moon?

If you were standing on the Moon, you would always see the Earth in exactly the same position, while the stars and the Sun moved around in the sky. The Moon takes 27.3 days to complete an orbit around the Earth. And this the same amount of time that it takes to turn once on its axis.

How many teeth does a cow have?

Cow’s teeth are different from ours. On the top front, cows have a tough pad of skin instead of teeth. They have 8 incisors on the bottom front and 6 strong molars on the top and bottom of each side to grind their food. Cows have a total of 32 teeth.