The categories range in difficulty—purple is the hardest, followed by blue, green and yellow, which is considered the easiest. If your four selected words are correct, they will flash in the ...

Nature Portfolio is here to serve the research community by publishing its most significant discoveries—findings that advance knowledge and address some of the greatest challenges that we face ...

The most used Emoji isn't all that surprising, and there's a good chance that you received or sent it today. It's the Tears ...

Women with untreated HIV tend to develop AIDS faster than HIV-infected men. Now, a new study provides insights as to why: women infected with the virus produce more immune-stimulating protein than ...

The wording of the phrase “nature vs. nurture” makes it seem as though human individuality—personality traits, intelligence, preferences, and other characteristics—must be based on either ...

A cat’s body language can also hold a number of clues to how it’s feeling. As for why your cat is angry, chances are it’s afraid, feeling territorial, having a conflict with another cat or a ...

Our nature field guides list ranges far and wide in its coverage of the natural world. At its heart lies the Princeton Field Guides series, comprising close to fifty highly illustrated, authoritative ...

According to Purina, there is no such thing as “average cat weight.” Veterinarians consider factors such as breed, sex, ...

Whether it's a cruise around the Galápagos Islands, a tree house stay in the Amazon rain forest, or a trek in the Himalayas, nature travel gives you unforgettable sights and experiences.

From ocean to sky, blue is seemingly everywhere - but it's one of the most difficult colours for nature to produce using pigments. Animals usually appear blue to the human eye because of microscopic ...

An hilarious note penned by the owner of a fame-hungry cat has tickled social media users after it was shared online. Perched outside the Iceland supermarket on Liverpool's Penny Lane, the ...