Time lock
Restart

Topic description:
Hard sci-fi is a branch of science fiction built strictly on real scientific laws and theories. Technological and physical plausibility matter greatly; speculation goes only as far as scientific frameworks allow. In these stories details have stakes: how a theory or device works can be central to the plot. Readers and viewers get not only adventure but a logically constructed imagined future.

Category description:
Time travel covers stories and theories in which characters move into the past or future. Common themes include paradoxes, alternate timelines, and how a small change can reshape the future. Time travel is often a metaphor for responsibility and choice: one decision can redraw an entire story and the fate of its characters.

Time Travel category
The Intriguing Pitfalls of Time Travel: Paradoxes and Alternate Realities
Time Travel
The Intriguing Pitfalls of Time Travel: Paradoxes and Alternate Realities
Avatar Legends Xbox Release Delayed, Shocking Fans
Time Travel
Avatar Legends Xbox Release Delayed, Shocking Fans
Exploring the Boundaries of Time Travel in Sci-Fi
Time Travel
Exploring the Boundaries of Time Travel in Sci-Fi
Time Travel: Paradoxes and Implications Explored
Time Travel
Time Travel: Paradoxes and Implications Explored

Space today

Upcoming launches

Space weather

Kp index 3 (unsettled)

Aurora chance low

ISS now

From Columbus 10501 km

Altitude 420 km

40.03°, 63.69°

Columbus sky

Sunrise 07:07

Sunset 17:22

Moon waning crescent (6% illumination)

Mars now

Earth–Mars distance 206.1 million km

Curiosity sol 4995 (2026-08-25)

Temperature -71…-5 °C

Pressure 777 Pa

Sky Sunny

UV index Moderate

Season Martian month 12

Mars Perseverance Sol 2031: SuperCam Camera

Mars Perseverance Sol 2031: SuperCam Camera

Astronomy picture

NASA Science

NASA Science

Sources: Launch Library, NOAA, Open Notify, NASA (Curiosity/Perseverance), Open-Meteo, IP geo