The blue heart emoji first came out in 2010 and was added to Emoji 1.0 in 2015. If you're unsure about how to use a heart emoji, we have this handy guide . When should you use the blue heart emoji?

A spectacular meteor jetted through the skies over Portugal and Spain Saturday night, dazzling millions of people with a blue-green fireball that lit up the night sky.

Sometimes the electric blue waves stays for days, other times it’s a months-long stint. What to know if you want to see nature’s show ...

Elon Musk’s newly unveiled plan to allow Twitter users to sport the social media platform’s coveted blue check for a mere $7.99 per month has focused unprecedented attention on the symbol. In ...

Beachgoers spotted bright blue, glowing waves in Southern California’s coastline this week. The bioluminescence waves, which turn the ocean red during the day and glow neon blue night, have been ...

The nighttime surf at many San Diego County beaches is once again flashing pretty neon-blue light that stems from plankton blooms that have developed in some coastal areas. In recent days, beach ...

The allure of bioluminescence — a phenomenon that turns the waves a glowing neon blue — has captivated people all along the Southern California coast from time to time.