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The existence of reproductive isolation, so that these situations can not occur, even if there are some individuals of different species sometimes complete the mating, but they generally can not produce offspring, or produce offspring can not continue to reproduce

Wild Tiger Reappears In Shadow, Rare Scene Captured In Malaysia, How Rare Is This Tiger?

Nov 22, 2025

Summer Insects Speak Ice - Why Insects Do Not Freeze Into Popsicle Sticks In -50°c In The North And South Poles?

Nov 20, 2025

Where Do All The Mosquitoes And Flies Go In Winter? How Do They Spend Their Winters?

Aug 30, 2025

Fungal Manipulation Of "Zombie Flies": Mating Won't Stop Even After Death!

Nov 16, 2025

Extraterrestrial

Astronomers: Senkaku 4 Was Pierced By a Mysterious Force Before It Went Dark

Sep 08, 2025

Top Articles

How Terrible Is The Reproductive Isolation Of Earth's Species? Is There Reproductive Isolation Between Humans And Animals?

Astronomers: Senkaku 4 Was Pierced By a Mysterious Force Before It Went Dark

Second Home Just Around The Corner? Probe Finds 'Reservoir', Nasa: Send People Up There By 2040

Wild Tiger Reappears In Shadow, Rare Scene Captured In Malaysia, How Rare Is This Tiger?

Curiosity Discovers Surreal Phenomenon: Cool Rocks 'Growing' On Desolate Mars, Defying Gravity

Earth

Worrying! For The First Time, Man Reaches The 8,919m Deep Yap Trench And Finds Something That Shouldn't Exist

What's Going On? Spiraling Object Appears In New Zealand Night Sky And a Series Of Fireballs Streak Across The Spanish Night Sky

How Was The World's First Man Born When There Was No Man On Earth Billions Of Years Ago?

What Is The Truth About The Loch Ness Monster, Which Became Famous After 1933?

Mount Fuji May Erupt After More Than 300 Years Of 'Sleep'? A Sixth Species Extinction May Be On The Horizon?

Earth Not Safe Anymore? Scientists Reveal Four Evil Alien Civilizations: Capable Of Invading Earth

Science

Five Signs That Mankind Is Witnessing Its Own Evolution, As It Never Stops

How Fast Is Mach 1? How Many Kilometres Per Hour Is It Equivalent To?

Why Is It That Only Uranium And Plutonium Can Be Used For Nuclear Fuel? But Not Other Elements?

Life May Not Have Originated On Earth, And There Is Growing Evidence That Life Should Have Originated In Outer Space

There Have Been Ways To Create Artificial Gravity For a Long Time, So Why Isn't Artificial Gravity Used On Space Stations?

If There Is a Time Machine, Then Why Haven't Humans Come To See Us In The Future?

Biology

Wild Tiger Reappears In Shadow, Rare Scene Captured In Malaysia, How Rare Is This Tiger?

Summer Insects Speak Ice - Why Insects Do Not Freeze Into Popsicle Sticks In -50°c In The North And South Poles?

Where Do All The Mosquitoes And Flies Go In Winter? How Do They Spend Their Winters?

Fungal Manipulation Of "Zombie Flies": Mating Won't Stop Even After Death!

Extraterrestrial

Astronomers: Senkaku 4 Was Pierced By a Mysterious Force Before It Went Dark

Second Home Just Around The Corner? Probe Finds 'Reservoir', Nasa: Send People Up There By 2040

Curiosity Discovers Surreal Phenomenon: Cool Rocks 'Growing' On Desolate Mars, Defying Gravity

What Is So Special About Gliese 581g, Thought To Be The Most Earth-Like Exoplanet Known?

Will Jupiter, The 'King Of The Planets' In Our Solar System, Become a Star In The Future?

Would An Alien Civilisation Reveal Itself Voluntarily? 355 Light Years Away, An Abnormal Star Appears