51动漫

vegetable bounty

What crops did Europeans bring to the Americas?

The diet of Europeans was enhanced by tomatoes, peppers, beans and maize from the Americas, but plenty of European crops were transferred the other way, say our readers

DRE532 Elephant (Loxodonta africana) waving its trunk sitting in the waterhole of Gwarrie Pan, Addo Elephant Park, South Africa

Why do humans have pubic hair? (Part 3)

A man holds his lurcher dog as the canine excitedly licks and nuzzles with a woman who smiles and strokes the pet.

This week鈥檚 new questions

What are these soft white balls (pictured) found under a drain cover?

DNMR0A Giraffe silhouette captured at sunset in Kruger blended with a full moon captured when rising.

Without moonlight, would life on Earth be any different?

Why do little children run everywhere instead of walking? (part 3)

Kid with jet pack pretend to be superhero. Child playing in summer. Kid having fun outdoors. Child pilot against summer sky background. Success, leader and winner concept. Imagination, freedom concept; Shutterstock ID 450428614; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Portrait of white cat with crown on head sitting on bed, Namibia.

What has been the most successful animal ever?

person aged group doing water aerobics in a swimming pool during a spa treatment; Shutterstock ID 167286806; purchase_order: -; job: -; client: -; other: -

In water sports, should fingers be pressed together to increase drag?

B70G62 Suriname, Brownsweg, Brownsberg National Park. Woman looking at Tarantula , Avicularia Metallica.

This week鈥檚 new questions

Do spiders survive when thrown from a height? And is it possible to tell, genetically, which of two identical twins is the father of a particular child?

Why do our knuckles make a popping sound when cracked?

How fast would you have to travel to be able to run on water?

This week鈥檚 new questions

What is the age/location/appearance of the world鈥檚 average person?