91av

ACROSS

8 NASA research satellite launched in 2004 (4)

9 Enzyme that catalyses the joining of molecules by a double bond (5)

10 H₂SO₄, HNO₃ or C₆H₈O₇, for example (4)

11 Subspecies of zebra, extinct since 1883 (6)

12 In medicine, relating to arterial pressure during contraction of the left ventricle of the heart (8)

13 The UK’s first road-legal, solar-powered car (8)

15 Thomas Hunt ___ (1866–1945), biologist known for his experiments with fruit flies (6)

17 To enlarge the appearance of something (7)

19 Muscle of the upper arm (7)

22 Plastic explosive developed in Czechoslovakia in the 1960s (6)

24 Theoretical substance composed of randomly moving particles (5,3)

26 Meme complex (8)

28 Glacial period (3,3)

30 In measurement, standard quantity or magnitude (4)

31 Electronic visual medium (5)

32 Ninth letter of the Greek alphabet (4)

DOWN

1 Hikaru ___, character in Star Trek (4)

2 Nerve-cell cluster (8)

3 NH₃, Ca(OH)₂ or NaOH, for example (6)

4 Road safety device invented by Percy Shaw (4,3)

5 ___ process, technique for the mass production of steel (8)

6 Steam-like substance (6)

7 Informative, collaborative, user-modified website (4)

14 Visible part of an exothermic reaction (5)

16 First letter of the Greek alphabet (5)

18 Wildflower of the genus Digitalis (8)

20 Telephone identification service (6,2)

21 Sulphur ___, SO₂ (7)

23 In maths, the smallest primitive abundant number (6)

25 Thomas ___ (1847–1931), “The Wizard of Menlo Park” (6)

27 Active volcano on Sicily (4)

29 Logic ___, device in electronics, typically AND, OR or NOT (4)